there had been multiple cases of toxicity and new player feedback on dungeons of all kinds. cases that include players within a party rushing objectives and skipping cut-scenes with valuable information and lore, leaving new players in the dust.
it is a flawed game design to force new players to play dungeons with other try-hard veterans just to progress the story.
this cannot happen forever, which is why i suggest giving us modified single player dungeons that can be completed once and only once. this will allow players to get a good perception of the dungeons and work better with other players the next time they play the same dungeon.
"just watch the cut-scenes via Inn/youtube"
there is nothing like playing a dungeon and keeping a consistent flow with cut-scenes while playing the dungeon.
"ask players nicely"
while i do not doubt that there are good players out there, i do not believe that every player you come across is going to be nice.
"this is not a single player game"
so suddenly adding single player dungeons that can only be played once makes the game single-player? of course it doesn't.