I like to think farmers are op because they level up by farming, tilling etc. and they do it all the fucking time their whole life, so they (mostly) gotta be like level 150-250-999 by just living normally
to be fair, seeing as how Adam is a Frankenstein type of guy, I bet the final panel is there just for shock and he/she can replace them for working ones without any rot. it's just to keep you hooked is what I mean