That’s definitely not accurate. I could have an alt be carried by my guildies in a 20 of X dungeon, and I’ll instantly get invited to anything below assuming im not like 30ilvs below the regular player queueing up. I could have no idea what I’m doing on my alt, but just because they see I’ve done a 20, they’ll invite me. Also, doing 1 dungeon 50+ times for one piece of gear is simply not appealing.