No one is asking for that (well I’m sure some people are).
Majority of people just want a system where people can’t leave after one bad wipe. Or rather are less likely to.
~ ~ ~
Not sure if you know this but there will always be threads about any and everything. If you ever used GD forums, you would know that. I know you think you’re a forum hero or something but really you’re part of the problem XD out here trying to police people who have a different opinion than you. Forums are all optional. You don’t have to read about any of it if you don’t want to. Exercise some self control 
~ ~ ~
Just because it’s not a problem for you doesn’t mean it’s not a problem. Those people have every right to voice their opinion of the game they pay to play just as much as you do. You have the right to voice your opinion as well but that doesn’t give you the right to dismiss them entirely because they don’t agree with you.
~ ~ ~
Except, it has happened to me. I have had leavers in my group. I’m just not super worried about it. I just see a lot of people that have problems but no solutions and then a lot of people like you who say there is no problem. Like you said, it can be both. A problem and not. Just like my solution can be a solution and irrelevant (to those that don’t want/need it)
~ ~ ~
Constructive discussion to help the key succeed is better than blaming and dumping on everyone, instead of being toxic, you could try to be more positive and encouraging. Try to fix the problems instead of just giving up. Most importantly, no one is forcing you to do anything. You are choosing to do an option form of mythic+ and that has it’s own risks/rewards. Why do you feel compelled or obligated to do ‘completion’ keys if you want nothing to do with them? Even with my proposed system, you could vote to get out, even with just your vote. No one is keeping you there and no one is forcing you to queue for the optional mode >.>
~ ~ ~
No one is being held hostage. They’re choosing to be there lol. You just keep making up problems that don’t exist to fit your narrative. It’s sad really.
I realize now that you’re just another toxic forum troll with nothing of value to add.
I’m just going to block you and have one less headache to deal with.
I truly hope you take satisfaction in the success of your trolling/toxicity. Hopefully some day you’ll try to contribute more to the discussion than just a bunch of negativity or at the very least try to respect other people enough to realize the world doesn’t revolve around you.
~ ~ ~
To everyone else, thank you again for suggestions and the discussion. Keep up the good work Hopefully some day there will be a solution people will be happy with (or happy to ignore lol).
Have a wonderful rest of your week!
Edit:
Came back after walking around a bit. I regret that I let Raiimir’s toxicity seep into me and that I sunk to their level. It’s not who I am as a person, I just really hate internet bullies (and that’s all Raii will ever be). I apologize for my behavior.
To anyone that’s ever been talked down to by Raii (or anyone else for that matter), just keep your head up and keep doing your thing. The world is full of negative people and negativity in general. Don’t let it cloud out your positivity
Thank you all, best of luck to you!