That argument doesn't work when rack rates fall though.... Did your dues go down when hotel rates plummeted during downturns like in 2009 and 2020?
Rack rates are irrelevant to me. If I was buying a condo/hotel (where you own a hotel room you can use, and it can also go in a rental pool from which you split the revenue with management) I might care about that. But a timeshare is more like a fractional condo and the HOA dues are related to the costs of running/maintaining the resort, which should be more correlated to CPI than rack rates.
If anything, I might care about point rental rates because I can rationalize it that if dues go up 7% but so do point rental rates, and then I am still better off owning. Unfortunately, when dues go up, more owners rent points (more supply) and rental rates may not go up at all or might go down. As others pointed out, a contract is generally worthless if/when point rental rates are lower than dues (and "rack rates" are not part of that statement).