Yeah, but 'overloading from loud vocals' is a whole 'nother thing.
Err? Well, a certain well loved (FKsw) interface was overloaded by not all that "loud" direct guitar!
And, we can put up with quite a lot of distortion of a certain type on a lot of sounds but the voice only needs a small amount to start sounding "edgy" or "gritty" ? Ok in the right context of course but by no means all.
Dave.