You are correct on this. But I will say that Disney makes a lot of money off of selling DVC. It will be a hard sell to sell those DVC points if there is no DVC AP available. Now I will say that a great selling tool would be to only allow DVC members to buy AP's. Maybe they would let you buy 1 AP per 100 directly bought points. The great thing for Disney is that they can cancel that policy anytime they want as perks are not guaranteed.DVC sure doesn’t guarantee annual passes.
As had been said countless times before: Disney is going to do whatever makes Disney the most money.