Why is that? Most new retail buyers aren't educated about resales and of those that are, they generally have a reason to buy retail over resale even if it's a poor one. Most don't go in planning to sell later and NO ONE should do so thus ultimately the resale value wouldn't matter much. If it caused one who likely shouldn't buy anyway, like those that can't truly afford it, to think about what they're doing because they'd be throwing the money away in a sense, all the better IMO.
Certainly if there is a larger spread between resale and retail, some that are educated on resale would jump to that option that might buy retail at the current spread. The value of owning a timeshare, any timeshare, is the value of it's usage including rental and exchanging. Since DVC is a poor exchange venue, the usage and rental dominate for DVC. Frankly, I'm not inclined to believe most of those even here that say they wouldn't have bought DVC if they thought the resale prices would decrease due to these issues unless they went in planning to sell later which I feel is a poor choice anyway. Realistically if DVC becomes a timeshare that can be had for pennies, like some, then there are other major issues, rather than the retail vs resale issue, as the main cause. Certainly there would be a FEW that wouldn't buy if there were a major shift in this area and there would be some that would buy retail because of such changes. DVC's goal is the sweet spot and they get to determine that, not us. Certainly DVC wants to continue to be seen as professional but most of the things they can do would still put them in that light to reasonable people.