It may not necessarily be that they queue for that 'hest, I suspect the system just picks that one if everyone's queuing for roulette and nothing specific, so it settles on the first one.

But, I'm pretty sure I've seen that go down with zero heals, so even if they weren't follow/afk-ing, they can just declare their style is "heal only" and they're fine to get away with not doing anything.