Do you have to be good at playing guitar to play metal or rock music

Iv always seen rock music as a kind of rebellion against other superficial music.. and rock music has not rules.. so does rock music need skill to be good? Is the only way to make good music is if you are good at playing  a instrument..? Surely music is subjective anyway.. and what one eprson thinks sounds good another may disagree... but who cares what others thinks.. surely this is the message of rock music right? Maybe if your music is just utter garbage and the vast majority may think that it sounds rubbish none will be willing to listen to it but surely your getting your message across and expressing yourself through music and that the most important thing right?