In the vast majority of cases I agree with you on this. This is why we bought VGF. That being said, we like to stay at BCV, BWV, VWL, AKV, and POLY every other year for a week in either a 1 bedroom or a 2 bedroom (or studio in the POLY case). We like to rotate each of those as we like each resort, but VGF if our main love. We are relatively young by some standards (35) and have young children (3 1/2 and 2), hence the reason we are looking into buying SSR for the end date. We can only travel in March, June, July, and August for the next 20 years as we are bound by our teaching schedules at work...so we won't compete for the late Sept-Jan periods until we are retired (and at that point we will use our VGF home points in the fall and other points for family summer trips).
AKV and VWL are relatively easy to get a 1 or 2 bedroom during our travel periods, that is why I was curious about BCV and BWV. We love BCV, but don't love the end date or the cost per point resale. We may purchase AKV for the end date and the knowledge that if we can't trade to (in order) BCV, BWV, or VWL, then we can always stay at AKV. We are not big SSR fans and would not be happy to be "trapped" there (no offense), but I have a friend who has owned SSR for 8 years and has yet to stay there (his family has gotten 2 bedrooms at AKV, BCV, BWV, VWL, and BLT every time). Just not sure what to do yet.