If someone can go ahead and link me data showing that ACLs snap easier at lighter weight then maybe I'd care.
There are only two factors weight plays as a WR:
1) Get bullied during press. This isn't even a thing because teams stopped trying to press him because he destroyed it so effortlessly in college against 1st round quality corners.
2) Their ability to block on the outside for designed run plays. If he's as good as advertised, I'm running him out on routes anyway and he'll just take the corner with him instead of having to block him.
People are overthinking this pretty hard.