Do you care if they used genuine replacement parts for the airplane that you are flying on? The point is who get's the blame, with genuine parts the manufacturer guarantees the quality control.
I own a (small) airplane. Yes we have to use genuine parts or parts that have a FAA STC/PMA approval for third party parts. It is really not the same as phones/computers as aircraft are absolutely regulated. Not being an FAA A&P I am not even allowed to do any work on my plane except a few minor things like changing the oil.