Because who needs pants, really?
A sock that doesn't make a statement is no sock at all. The louder the better, the more it justifies the existence of socks.
You know what's more obtrusive than a neon pink sock? A neon pink sock with flashing lights. And a built-in speaker that plays "Who Let the Dogs Out" on repeat.
Just because everyone else is doing it, doesn't mean it's right. But hey, who are we to argue with the fashion gods?