Sure, they're entitled to play how they want to. By the same token, I am also entitled to play how I want to. So are the other six players in the party. At that time, it turns into a 'majority rules' situation. Is the majority of the party there to learn and not necessarily to clear? Fair enough, I'll either help them learn, eat the half hour penalty, or get myself kicked. If the majority if the party is there to clear, they have every right to kick the player or players that are keeping them from doing so. It's a simple matter of differing play styles.
You're exaggerating. Nobody's saying anything about not being able to stand a single wipe. Even "pros" can make mistakes that cause wipes. But if a player is going in completely raw and hasn't even seen or read a guide, it takes that much longer to get through stages of the fight that many of us basically snooze through. Unless I jump into a clear/learning party, when I go into a PF party I intend to farm it. That doesn't mean 'struggle through it six times before finally clearing it and then repeat'. That means get in there, get it done quickly, and do it again. Obviously I can't hope to farm through DF, but my feelings there are pretty similar. I don't go into DF parties intending to spend upwards of an hour teaching the mechanics to someone that can't even be bothered to watch a 5-10 minute video to at least pick up the basics before plunging in with seven other random people.I rather have a party of newbies who keep trying than one made with "pros" who can't stand a single wipe because of an unexperienced player.
I understand wanting to experience new content. Really, I do. I love the feeling of going in blind with three or seven other players that are also going in blind. The problem is, the duties that available in solo queue through Duty Finder more than likely aren't new content to 6/8 or 7/8. It's stuff we've all done multiple times before and asking us to go through those "learning stages" again just so one person can get the "full experience" is pretty selfish. Suck it up, catch up to the new content, and have fun jumping in blind when the fight itself is new.