Competition should be fair
Stages like Gaur Plains, 3D Land, Balloon Fight, Magicant and every other horribly hazard based map influence that fairness negatively. They either impact so many MUs negatively or just the general meta negatively by making matches too unfair
We can't have a stagelist with every stage or even half the stages being viable because at that point you're altering the balance and fairness of competition, which is a no no. Unless you have some kind of horribly tedious ban-related solution so that players could ban a ****ton of stages, but at that point I guarantee you that players would ban every stage but the 5 or 6 stages the community has decided SHOULD be in the actual stagelist, so it wouldn't change anything aside from making sets take longer.