Lol, a knee replacement surgery is basically something where you are forced to start rehab after the surgery, hip surgery, especially when it happens fucks you up hard, especially pain wise.
Have had about 4 to 5cm hip taken from the right to graft to the shoulder, can't even walk properly and the worst part is if something goes wrong slightly you get severe nerve damage which I ended up with, so that means my whole thigh on my left side will be numb and unable to walm for a few months at least.
A lot of doctors cringe and give the heads up on how painful and hard recovery is when it comes to hip surgeries, grafting, replacement etc.