Then you've never stayed at WDW during peak travel season (or at least, not in the last few years). Many families can't travel offseason due to school. I'm staying at the GF in mid-March this year using an AP discount (40% off rack rate), and the pre-tax price for a garden view room for my dates was $520 per night (over $600 with tax).
That said, when comparing
DVC savings to non-DVC, potential buyers need to consider common discounts before making the comparison. If you go to WDW often enough to buy DVC, then it makes sense to get an annual pass (whether or not you buy DVC), and annual pass discounts are the most generous room-only discounts WDW offers the general public. 40% off of deluxe resorts is a standard AP discount. Even without getting an AP, the seasonal room-only discounts typically are 30-35% for deluxe resorts. That should be taken into consideration when comparing deluxe resort pricing vs. buying into DVC.
When I attended a DVC presentation on our
Disney cruise, it rubbed me the wrong way to see the presenter only comparing DVC prices to rack rate for deluxe resorts. WDW offers a lot of discounts to rack rate, and offers them regularly.