This is true. But the Greeks are known as one of the most rebellious elements in the Empire. Alexander had to pacify them twice before leaving for Asia, Antipater had to crush the Spartans by himself at Megalopolis because they decided to lead a revolt again. Phillip had problems with them as well. It's honestly a fair assumption that with news of Alexander's death they would revolt. So, while we shouldn't meta game knowing everything about the Greek revolt, common sense would have us suspecting it will happen.