For stuff like hard primals you do have to be geared and know the fight in order to actually do well. Well Ifrit hard really isn't that big of a deal , but the other two can be painful if people don't know what they're doing in it. Worse if they can't get past the DPS barriers.

But knowing the fight is as simple as watching a video, I actually wound up in a party with the party leader asking people to watch videos if they could while we waited on filling up the party. Even after that we still went over everything before starting.

What you're seeing is just the people who made it to the milestone of 50 + gear first and are trying to find people who will make what they're doing less stressful.