It's canon that someone intentionally designed a mass-produced model of killbots with chest-cage straps, paw pads, quad tails, and thicc af thighs complete with shaped butts.

Emerald_Acid said in comment #2585717:

It's canon that someone intentionally designed a mass-produced model of killbots with chest-cage straps, paw pads, quad tails, and thicc af thighs complete with shaped butts.

Would be funny if said person was revealed and explained why they did that.
Also, sort of related to this, I don't think the crotch plate is for robussy. It literally makes no sense for that to be what's behind it.
Personally I think it's like an access panel for an internal power source, or a storage drawer that can be pulled outwards and have stuff stored in there, since they don't have pockets.
Just my opinion on it.