You are correct, but the question at hand is what exactly are you paying for. The point of my post is that some people are in fact paying for THE OPTION to stay at Poly whenever they want to, because that is important to them. Even if they do not always exercise that option. They are not buying 50 stays at Poly, but rather they are buying into all 14 of the
DVC properties, choosing the resort they want to have TOP PRIORITY at as the Polynesian.
If you want to have the peace of mind that you can always get Poly whenever you want, and you know that you want to stay at Poly more than any other resort (even if that only means 20 times out of 40), then the only way to guarantee that is to buy direct at Poly. Sure you can gamble and get cheaper points resale and hope you will be able to get Poly at the times you want 7 months out, but it is far from guaranteed. Especially if you want to book 7 days straight in a lake view over a holiday weekend or during F&W. So if what you are buying is the OPTION to stay at PVB whenever you want to then you actually aren't overpaying for anything, as there is no cheaper way to purchase that.
And just because you did purchase there it should not stop you for booking the right resort for any given trip, as to best fit that vacations specific needs. If you want to stay at all the DVC resorts 1 time and PVB every other time (that's about 18 stays elsewhere accounting for new resorts and 22 stays at PVB) at the times you choose then you should probably buy Poly. Buy where you WANT to stay... not buy where you are going to stay every single time. I strongly feel you would be cheating yourself never to experience the other resorts because you know you want to stay at a premium resort more often then not and want to guarantee that.
Going back to my steak analogy, you aren't overpaying because you didn't eat the whole steak. You stopped eating because you were satisfied... You got your value out of it. Sure you could have gotten a smaller, cheaper steak somewhere else... But it wouldn't have been that steak with its unique taste and flavors from that chef at that restaurant. You surely aren't going to ask the kitchen to cook you a smaller steak for half the price, so you pay the full price... even if you are only going to eat half. Because there is no cheaper way to get THAT exact steak that you want, just as there is no other way to get top booking priority at PVB without buying direct, even if you are only going to use that priority half of the time.