Not holding up gameplay for an inordinate amount of time, it's against the rules. You are preventing other people from playing.
And no, people learning the content isn't the same as holding you back from playing. DPSes wiping multiple times while trying to learn are correctly trying to engage with the content. They're not holding up gameplay on purpose even if it means you clear the dungeon a bit later. If they ARE by griefing, not doing their job, standing in damage, etc then you might have an angle but otherwise you don't. If it takes longer to clear because you have to let other people learn the content instead of soloing it, it's your job to deal with that reality.