This then flies in the face of their end result. Blind queues would stop the cherry picking, and its a proven working system in WoW that you are praising.
Oh I totally agree on this, though it isn't completely true as you are talking in absolutes, and I am a straight up example (and there are others) that its not an absolute. When I check in progress I take whats available, if I'm helping a group finish that is great, if I'm starting one up that is great too. My incentive is what I joined the run in the first place for. I think tanks are certainly rare, and wouldn't be against incentive programs for people to queue as tank though, that would be smart of SE to do.
Whether they abandon the duty and decide to take 30min penalties is up to them. If you don't think queuing for a new run in 30mins and getting one even half way is slower then actually completing a dungeon you first get, then you'd be crazy. There shouldn't be any "shortcuts" for anyone, that isn't the design purpose of *Join in progress*, it is to get stranded groups through a dungeon.
Who said anything about marginalizing players in it for loot? Whether or not you are in it for the loot, you can earn it from where the queue places you, like everyone else. The fact is, you just want to be handed loot for being a desired job. You already receive the reward of being a desired job with instant queues. Stop acting as though blind queues will take away *in progress* groups, because it won't, and will continue to prioritize stranded groups as they come. The incentive is still there, but the ability for a selfish player to queue spam for a run they deem acceptable would not.
Again, you are assuming there is no reward for queuing as a tank, and that there is no penalty for queuing as a DD. Literally instant queues as a tank, while DD sit for literally an hour at times is plenty enough to refute that claim. I am not against other incentives to keep desired classes in queues, but being able to choose which boss you want to start at should not be one. Also, you are completely wrong in assuming tanks will stop queuing if the option of "in progress" is taken away. People are joining queues for a reason, whether it be the gear along the way, or the reward at the end (myth tomes), and that incentive never changes. Tanks still want to myth cap at the end of the week, they aren't going to magically disappear if they can't choose to start at Archeon.