Also because owners don't get the NT merch boost if there player is riding the NT bench. Or at least it is no were as large as if he played some. So a theory I thought before I found that is out, is why don't we put the best 18, 19, and 20 year old on the U21 team so there owners could get a merch boost and afford to keep them, and perhaps use that extra 8-10k per week to buy a roster that can help them promote, so they could eventually train them to the NT. However unless they play we are just wasting 3 spots. So that is why players that are not worthy are not put on the NT plus the obvious lack of skill reason.