Dungeon Finder is a great part of the game. But its existence isn't going to cause us to design everything for the lowest common denominator. If you get a bad player in your group, give them some pointers. If they refuse to listen, kick them. If you can't kick them, then bail. You're a tank -- your queue is short. They have a lot more to lose.
Actually it doesn't say at all what my title implies, but I found it interesting anyway.
And yes, I know it's not new. I don't do news. I do recent olds.