Simply put, %50 is not enough because it may not be an even split with some kind of middle ground that has no preference. Map voting would essentially be the same problem. There are practical problems with that anyways. The only maps available for voting would be that weeks rotation and its more work to put on dadda. Easy to say 'do this' when you arent the one doing the work.
The fairest thing to do, for all players, is the preset rotation. Like a preset sports season. The teams and players dont get to choose where they play and when. If they dont like it thats too bad. They are always free to forfeit or leave the league while everyone else plays. Feedback is always good but when it comes down to decision making it is not a democracy with majority rules. You do what is good for the sport not what is good for the vocal majority.
So its a simple binary question. If all play styles are permitted, and they are, then map rotations must also be fair to all play styles with no skipping. Since many great maps are designed for a particular style that means mixing up the maps.
But yes, when trying out new maps... which most here want (some dont want new maps)... some are simply 'bad' for everybody and all play styles then taken out of rotation accordingly.