I wish I even understood the question.

The term you're looking for is "medial side" (closer to the centreline of the body).

They probably wear down more on the lateral side, shafing on shoes and whatnot. The medial side is more protected.

Tonsils? You surely meant toenails right? My tonsils grow in my mouth. I don't cut them

Yeah I could use a pedicure

What's going on here... Did you mean toenails?

I think I understand what you're saying. You are wondering why the middle of the toenail (not body, feet are clearly on the very end of that) grows a bit faster than the bits on the side, leading to a toenail that's a bit pointy in the middle, which could be quite annoying to you.

I think it's because, when you cut your toenails, you almost always cut from the corners, not straight on, leading to a toenail that is more pronounced in the centre, since you usually make the edges of the toenail shorter than the middle.

Another theory is that (pulling this from a hat, I didn't take Biology), since toenails are essentially just dead stuff that's growing from the corpses of alive stuff underneath the toenail, there was some evolutionary advantage to having extra alive stuff in the middle of your toenail. (perhaps to better protect that alive stuff, as it could be more vulnerable out near the edges or maybe to make the toenails sharper and pointier for better grip)

There is more alive stuff in the middle, I know this from experience that when cutting too far into the toenail, it's far easier to touch the alive bits in the middle (it's painful!) compared to the edges.