[Sharlin]

Well, it depends. Certainly nylon and polyester can be vastly stronger than cotton, that's why they're used in many garments requiring mechanical durability. (Heck, ballistic nylon is a thing; you don't hear about ballistic cotton!)

But sure, it's also true that you can make extremely low-durability clothing from synthetic polymers that aren't even intended to last (ultra fast fashion is incredibly destructive, yes).