As a previous poster mentioned, I also have not seen anyone on this board who's successfully used a supposedly cancel-for-any-reason trip insurance policy for rented DVC points. And there was a lot of discussion about it at the start of the pandemic when WDW was closed.
If you think there's any chance you might want to cancel--or be forced to cancel--then I would stay away from renting DVC points. My apologies to DVC owners trying to rent out their points, and certainly there are many DVC owners here who are willing to make accommodations. But sometimes an owner can't make accommodations if, say, their points are about to expire.
OP, summer discounts haven't been released yet. It's possible that they will be and that you'll be able to book something more affordable. In the meanwhile, hang on to your current reservation.
One more thing--keep in mind that you might want to cancel because you feel uncomfortable about the trip, but that might not be a good enough reason for an insurance company to refund your money. When you make a reservation renting DVC points, you pay for the entire trip upfront.
Right now with uncertainty about the pandemic, I personally would not rent DVC points, something that under other circumstances I'd do.
Yes, this was my original line of thinking. That cost difference had me re-assessing though! I appreciated your perspective.