I don't need no Mei

The point is it's the cheapest possible meta team. Even if you could guarantee ninja pick, there's no other meta team that in "best case scenario" costs the same or less. If you are lucky or not to pull required ninjas, doesn't matter because it's the same requirement for any team with kage ninjas. Unfortunately for the playerbase, with low ammount of seal scrolls game forces you to play with what you have, not with what you would want/like to play with. I for one completely understand those people, since I've used 800 seals there and still have neither bee or chojuro.