Like I said:
Let your players still have their agency; don’t just declare that it doesn’t work (unless you all wanna agree to house rule that it just doesn’t exist or something).
Like I said, I agree with you about not just cancelling it entirely unless there's an OOC discussion about making a house rule about it.
You can't let the players ruin your fun (and, likewise, their own, because it turns a challenging situation into some stupid anticlimax and basically removes curses from the game as a mechanic). Likewise you can't ruin your players' fun and just unilaterally say this curse is removal-proof. Fortunately, there are multiple middle ground third options available, that preserve the fun for all parties involved.
It brings me joy that Everett's wife is just as much of an unapologetic clod-thumper as he is