Sure that makes sense completely.
However, it would only ever make sense to sell if I need to liquidate. Otherwise, having the points do me no harm as long as I afford the dues which I could rent the points if I couldn't. Since Aulani is so expensive, its not easy to rent there for a week on a 2 bedroom, as I learned this year and precipitated our purchase. Would 300 at VGF and 300 at Aulani with the same UY be ideal? Sure, but we would have paid much more for VGF points and would therefore not want to use them at Aulani. Also, if I bought three 200 or contracts, I'd have paid tens more dollars each point. Moving the line out on everything.
If for some reason, I couldn't afford the dues, I'd rent or sell and the loss ( supposing there is one) would probably not be more than the money I saved using them while I had them. If I just plain didn't want to use them anymore, I would donate the time to my children's school auction or as gifts (I know they are Not tax deductible) I also only paid 1 closing. I don't see a crippling downside.