I'll give you a very good reason: The dues.
Current annual dues for BLT are $5.6223 per point. Current annual dues for Vero are $8.1064 per point.
So, your 50 points at BLT will be $282 in dues. Those VB points will be $1,216 in dues.
If you want to stay at Vero Beach regularly, with the 11-month window, sure, buy Vero. But if you want to stay on WDW campus, buy a resort there for 11 month booking, and look at the dues. While, yes, you get triple the points at VB, you are paying over 4x in annual dues for those points. Over the life of a contract, that adds up, a lot.