Football for example is really an unfair sport. Yet is the most popular one.
The game doesn't have to be 100% fair, but it must be FUN and entertaining. You can have a game that is super duper fair and boring at the same time.
Yes but football has mirror matches. If in each game, one team was always on offense and the other was always on defense I don't know if football would be as popular. Imagine if a really good defensive team lost the coin flip in the Superbowl and had to play offense, or if the Superbowl was a best of three and two good defense teams were up against each other and one had to play offense twice.
Football also has mirrored maps too.
In fact most competitive sports have mirror matches and many have mirror maps...