Actually, OP doesnt even talk about YPA, he's reffering to Y/C...I never said that. Whats funny is you deciding to jump in a conversation that wasnt directed to you.
But since you want to….
YAC/YPA has zero to do with arm strength if the pass plays are all short plays that break open. The OP stated this observation of high YPA like it clears tua from being “weak armed”. Anything else you want to comment on?