As exhaustively explained above: The ancient battlefield is full of potential missiles to be rethrown. Javelins and stones cast at you by the enemy can apparently easily be thrown again, as evidenced by the fact that the Romans took steps to prevent their missiles from being thrown back, and gave explicit permission to their troops to leave formation in order to collect more missiles.
It absolutely IS up for debate. The fact that you advance this nonsensical view demonstrates that it must be debated, because it is incorrect.
Listen: My primary hobby is historical European martial arts. I fight with longswords, that is my preferred sport. Blunt, but realistic in weight and handling. Some people in a sparring or competition bout are more aggressive, some people less. But do you know what most often happens when two opponents, unfamiliar with one another, face off in a competition bout with advancement or elimination on the line? They circle cautiously, often for some time, before either is willing to commit themselves to a blow, and the exchange is often very brief. That is with blunt weapons, where you are not going to be injured or killed by a single mistake as may be the case with sharp weapons. If people aare usually so cautious with blunt weapons in friendly competition, why would they be any different in real battle with sharp weapons and life and death on the line?
The medieval Italian fencing master Fiore dei Liberi wrote: "I, Fiore, said to my students that were obliged to combat in the barriers [i.e: Tournament combat] that combat in the barriers is a far lesser peril than combat with sword of sharp edge and point in arming jackets. Because for him that plays at sharp swords, on a single cover that fails, that blow gives him death."
I ask you: Would YOU impale yourself on a pike willingly? The fact that the primary sources which describe pike warfare in the age of pike and shot focus on instances like men impaling themselves willingly on pikes is
because such an instance is unusual.
The fact that humans in mass violence think firstly about their own safety, secondly about protecting their comrades, and only thirdly about attacking or defeating the enemy is well evidenced throughout history. The fact that sometimes a man, by desperation or misjudgement or uncommon courage, attacks in suicidal fashion does not change the fact that generally speaking a human will instinctively seek to preserve his own life and safety first and foremost in any violent encounter. To quote Ardant du Picq: "Man does not enter battle to fight, but for victory. He does everything that he can to avoid the first and obtain the second."
And further he states: "there is no shock of infantry on infantry. There is no physical impulse, no force of mass. There is but a moral impulse."
Ardant du Picq was no abstract theorist, but a career soldier who saw active service with the French Army in the Crimean War, and in colonial campaigns in Syria and Algeria. He died on active service in the Franco-Prussian War. His
Battle Studies is rich both with scholarship of ancient sources and with his lived experience of real war and violence.
Even in a culture like the Romans, which prized single combat above all things, the Roman soldier wants
scars and the social and economic advancement that comes with a successful performance in battle. He may be willing to die for his glory, but he's not
seeking death actively. He may be seeking glory and the esteem of his community, and he may be willing to risk death, but he must live to enjoy those fruits. He may have been very different in culture and values to modern people, but humans remain the same in that our instinct for self-preservation is among the most deeply ingrained and most fundamental.
If your model for pre-modern mass violence requires for human beings to act like insane people and disregard their basic instincts for safety, it is a bad model. If your model requires for human beings to perform superhuman feats of endurance and exchange hand blows for hours, it is a bad model. Your model dehumanizes them, because it does not regard the people within these ancient armies and formations as human beings, with human emotions, fears, and instincts.
There can be no physical impact in a battle either, except for perhaps in very rare and brief circumstances. Here's a practical demonstration of why that is the case, from a group of modern hoplite reenactors in France:
https://www.youtube.com/watch?v=GRLgtM6-47E
https://www.youtube.com/watch?v=O-4vzsxVFvE
These guys are testing out the theory of
othismos in hoplite combat being a form of physical shoving being locked shields. What do these experiments demonstrate? Physical impacts of massed groups of humans, armed and in formation, are nonsense. Look particularly at the moment of impact in the first video. The two formations shatter, they fall apart, the encounter becomes not the braced shoving match which the physical impact model alleges would be the result, but an uncontrollable melee in which, if the weapons were sharp, both sides would suffer horrific losses. In the second video, they come together more gradually and push against one another, but look at the front-fighters stuck in the middle: They're being crushed! They can't even wield their weapons or even stay on their feet! The rear ranks pressing forward are tripping over them! Why would anyone voluntarily fight in such a way? It's self-evidently nonsensical and ineffective. A person needs space to wield weapons