True that. Mainly because his 2P is also part of his combos. But the thing is: I don't see a lot of players using 2P. I don't understand why. It is usually safe on block, is generally about as fast as your fastest mid, crushes highs and it is a good tool to escape pressure.
I understand that not everyone's 2P is equally good. Even so, the purpose of a 2P is not because you want damage. It is mainly used as a quick high crush or a 'get off me' tool when an opponent is trying to pressure you. It is also a quick and safe way to finish off your opponent if they have very low health.
Forgot to mention, another purpose of 2P is to pop some characters out of their stance to interrupt their momentum. Examples would be using 2P to interrupt Helena's Bokuho, Christie's Jakeiho, Rig's Bending Stance and Hayabusa's Ongyoin stance.