My all in one is pretty all in one.

your statement is kinda confusing but..

an all in one comes with a monitor, keyboard and mouse (typically), hence the all in one. if you're just looking at the desktop part, that would be just a tiny/mini PC. it still comes with kB/m (typically)

Hmm, I think it's usually at least two fewer parts - monitor, compute, and speakers.

Also, some all-in-ones have touchscreens, so technically usable without a mouse/keyboard.

Smaller stuff is harder to make.

Still none of them have neither meatmincer in them nor even a chair. Not much for all-in-one.

The only thing different from any truely All-in-One computer over a laptop I've seen is the size.

But the only actual all-in-one computers I've seen were iMacs or extremely old computers from the 70s. And I guess the iMac isn't 100% becsuse it doesn't also have a mouse and keyboard built in, like the PCs from the 70s did.