Better players do deserve to win but there are map elements which people highly dislike to see as a key element that makes or breaks a round or match even. Sniper sightlines are a good example of this, mappers understand that huge sightlines give a massive advantage to whichever team happens to have a better sniper, thus the sniper can essentially carry the team. Because of this mappers tend to cut down on sightlines.
I'm not saying the fact that one team can get a really fast rollout and have a massive edge on the midfight is a bad thing or something I personally dislike, i'm just pointing it out so the mapper can decide if that's an element they want to have as a prominent cornerstone for the midfight, or if they want to change the dynamic of the midfight to be more dm based rather then whoever gets there first wins.