While they do, the other part of the equation is that they open sales in advance and often those owners are then loaded up with points. Say I buy 31 Jan with a Feb UY, I then have 2 yrs worth of points to use over the next year if I don't borrow and if I borrow I could get up to 4 yrs of points to use in 2 yrs. My observation is that this and the fact that most new buyers plus other owners are rushing to stay there means that from opening through the first 2-3 yrs from when sales are complete, the impact is greatest for reservation pressures. Obviously not everyone buys at the end of their UY, my estimate is that there are around 20% extra points above what's available to reserve the first couple of years including declared but unsold inventory, not counting borrowing.
Now for VGF things may not ease up as much as other resorts have but I do believe it will be easier to reserve for new members and at the 7 month window in a couple of yrs than it is now. Still, my opinion is that those who want to stay there routinely should consider a fixed week. Personally I wouldn't own there without it and if I couldn't afford to buy in that way, I simply wouldn't buy there even if I otherwise wanted to.