Personally I find this form of thinking far more dangerous: I come from a country in which being “mentally disabled” would literally mean me being unable to function in polite society, and being a “retard” is something pretty common, even with adults. The fact I was undiagnosed autistic until I left saved me. Sure you don’t function like everyone else, and yeah, it’s hard - trust me -, but to say you’re broken is basically undermining everyone else that has the same condition as you.
I didn’t use to either shower or bathe but it was a mental health issue: I went though both depression, which didn’t help, and I didnt have good showering habits due to being kinda aquaphobic. If water hit my face at all I would think I’d die (pretty dumb I know). Nowadays I bathe pretty much daily. Having a detachable showerhead helps a lot so I don’t have to deal with water on my face.