Well, I have pets who drag toys into walkways where it's easy to step on. I also have atypical proportions and it's a challenge not to accidentally kick a table or chair leg dodging said pets or their toys.

Furthermore, I don't want to make people look at my feet and just socks wears down the socks/can be slippery. Socks also don't shield my feet from spills or things being dropped on them.

Cold hard floors?

If you’re in your house then why are you wearing shoes?

Plantar fasciitis - I can't even make it across a room barefoot without severe pain, so I wear slippers with orthotic inserts at home. That being said, I would amputate my own feet before wearing crocs.

Dog slobber. We have two dogs. One loves to take a big mouthful of water and run up to my wife and me with it, splashing drool water everywhere on the way. The other has recently learned this trick from him and now we have double dog drool. We don't go barefoot much anymore.

Not everyone has underfloor heating