I hate quoting on this forum Rinhi, so I'll just respond this way

I didn't mean dungeons or raids with making things easier, I meant duties you fail, or trials with the.. echoes mechanic? The game itself is helpful if you stumble. It wants you to succeed, to continue with the story. It's not out to make it super challenging in the content that is designed for everyone. So for better or worse, the game is ok with people not playing optimally.
I personally think it is so much better if a community is accepting of non-optimal. If it's not a big deal. Because effectively you enlarge people's comfort zone that way, instead of restricting it. People stop playing tanks and healers because they are scared to screw up. They are scared to make people upset and angry with them. And to then say "Good riddance, you were apparently not cut out for it" is a *beep* reaction which I do see happening. It's just a game, support people, have fun with them, laugh with them, forgive mistakes, forgive limitations, let it revolve around the people and the shared fun instead of the clock and 'optimal this' and 'optimal that', and efficiency and all that crap. Bleh.
I greatly dislike being a burden to a group, so I will always try my best, try be prepared etc. But I'd rather the atmosphere is such that at times you get people who blissfully unaware waltz in and have no clue, and that that is ok, part of the random 'no idea what I'm signing up for, yolo', than that everyone can only join in if they perform up to standards other players set. If you do that in your FC, in PF, in your raids obviously that is fine. But we're talking DF here afaik. And then it should be ok for people to play at their comfort levels, instead of yours.