Because they want an easy fix, the lazy fuckers. Like with everything else - they know they look like a pile of garbage on two legs. But putting effort into fixing that? Nope. They want the magic creme so their face doesn't resemble a pimpled, greasy moon, they want the magic pill that makes them skinny, they put tons of products into their hair (and it still looks like they stuck it in the deep fryer).  They're lazy pigs. They know they're going to fail at anything that needs effort. And they actually believe it makes them look better, even though humans can still see the pile of garbage.