Fully clad in bronze? No. Most hoplites wore linothorax, and not all phalanxes were impenetrable walls.
Sure, sparabara were useless, but only Persians fought as sparabara - what about the Lydian, Assyrian, Caucasian, Egyptian, Phoenician and Thracian troops? Phoenicians and Assyrians used armored spearmen long before the Greeks, and Lydians probably had hoplites before the Greeks.