You think design cannot account for different players preferring different activities?
"Go away" is not an argument for why something is fun.It is okay for people to not like a game and to stop playing that game. Trying to make it 100% fun for everyone can often back fire. Just look at how offering more ways for casual players to gear up has been called "to quick" by you. Or that it forces a player to reject all other concept. Isn't it strange that attempts to do exactly what you want are also labeled as bad by you?
FF14 does exactly what I'm asking for. Destiny 2 does exactly what I'm asking for. GW2 does exactly what I am asking for. Maybe because they do it well (and three different ways) and WoW does it poorly when it does it at all? If someone wants to play casually and do dungeons and BGs sometimes, why shouldn't we give them rewards for doing so? How is the game made better by cutting them off almost immediately when they hit max level? Why would we work this hard to keep casual players out of content?