I’ve noticed, that there is a huge change in demand for tanks between dungeons and raids. As a tank you can instantly find a group for a dungeon, because Mythic+ requires 20% of the players to be tank. However, in raiding suddenly only around 10% of the players need to be tank in most cases.
This means, that one form of related content needs double the amount of tanks.
This means, that it’s impossible for the PvE-Playerbase to actually settle at an optimum between supply and demand currently, which makes it frustrating for DPS players to find Dungeons, and for Tank players to find raids. Blizzard should make sure, that various forms of PvE content require the same % of tanks, healers, and dps.