As long as you feel refreshed when waking up what's the problem in sleeping more than (((8 hours))), how can it be bad?
If you manage to sleep it means you were supposed to, take other animals, when they're not eating or fucking they sleep whenever they want to, why should it be a problem for humans?
I repeat as long as you're not narcoleptic/chronically tired/feeling sick or whatever why am I supposed to buy the oversleeping meme?