Canon: It isn’t obvious, but Potions actually required the use of magic near the very end of preparation to give it the perfect touch, so a Squib would not be able to create them.
Me: *aggressively ignores that*
wait, where in the hell is that in canon?
Pottermore. Which sucks, because Pottermore has some stuff I really do think is awesome, and then it has stuff…like this. Sigh.
Maybe console yourself with the fact that after the first seven books, JKR’s basically beating a dead horse?
Death By Catchphrase 