Adolescents and younger teens aren't really know for their introspection, I kind of give them a pass for saying that stuff at that stage in their life. At that age, lots of us learn how stupid something is only when we hear it coming out of our own mouths. It becomes really cringe though when they graduate into adulthood and they're still saying that or holding that opinion. At that point even their peers are given them the side eye or saying something like "dude, that doesn't fly anymore. Get your shit together".