You're claiming some big fallacies here.
1. The loudest stadiums by recorded decibel level are open.
2. The greatest QBs in the game right now play in open stadiums. Legacy isn't about stats, it's about sustained winning and championships. Talk about free agents...ask Emmanuel Sanders why he came here. (By the way, he's mostly played in open stadiums because it's all about the QB, not the building)
3. Players really do like playing in the elements. It amps you up and it's fun. Sitting in the elements sucks, but playing in the elements is a blast. Ask Pitt, Seattle, Green Bay, New England, Chicago, KC, SF etc how hard it's been to get free agents. As long as you're a good team with a good QB, it's not hard. The elements is a non factor.