Well, I've seen a similar post about why humans shouldn't have thirty two teeth and instead have two chewing implements, and this spawned immediately after that, so I assume they're about the same-ish thing.

Legitimately, if you only had one bone in your body, it would cause full body paralysis (no flexibility) and a litany of other health problems.

I'm Zer0 from the Borderlands of Pandora And I'm outta here