By comparing people to these slurs, you enforce societal norms that indicate that the said group has less value in society.
Since humans are social creatures by nature, you are essentially dehumanizing an entire class/group of people because you can’t come up with something more clever to say.
To err is human, we all make mistakes, intelligence/sight/etc. has nothing to do with it.
I couldn’t do it, I’d be worried everyone could tell I was high. Tbf tho, no one called him out for licking rocks… sooooo idk. I’d just hate to be remembered as the rock licking guy