Those who are not familiar with the resale option won't care. They will buy still direct and probably won't realize the implications of what the restrictions do to resale prices, if they even bother to read that fine print in the contract.
But if the resale product is too "functional" (can do most of what the direct product does) those who know about the resale option will never buy direct, especially if the price disparity is high. That can be "resolved" by making the resale product useless for internal exchanges. Now you may get some of those potential resale buyers to buy direct because they want to have more "bells and whistles" and trade internally. You may also lose some potential buyers, like me, who under some conditions may be ok with buying (unrestricted) Poly direct for $50/pt over resale but not (restricted) Riviera direct for $100/pt over resale. Their gamble is probably that it adds more than it detracts.
Moreover, they can play the long game - as time goes by and the resale options become less attractive, because there are more restricted resorts and unrestricted resorts will start expiring after 2042, this will just be the new normal - buy direct, or settle for a cheap but very restricted resale contract. For a company, it's a lengthy transition period they decided to go through. As individuals, we don't all have that same time horizon.
Owners who own/ed with other timeshare systems (eg Vistana) have seen what these type restrictions do to resale prices. Now that maintenance fees are out of control, most Vistana resale prices are relatively low, but if you look back 10-15 years ago, the Westin Maui and Westin Kierland (in the AZ desert) were selling on the resale market at 3x-5x relative to other Westin restricted resorts like Westin on Kauai or the Westins in the CA desert. The same could be said for the Sheraton Vistana Villages (first 2 phases) vs the later phases at that exact same resort, for which there was very little interest on the resale market. With that history, I wouldn't be surprised to eventually see DVC prices for restricted resorts like VDH and RIV be much lower even than where they are today. The number of sellers will only grow and the buyers willing to pay current prices are limited.
It's possible that, just like Vistana and Marriott, DVC will eventually decide to entice the "informed buyers" to buy direct by offering to enroll their existing resale contracts in the system and make them fully functional again. That's a rather costless way (that only DVC can do) to get someone to buy something for $240 if its resale price was $80.