You are correct, it's inappropriate.
But I'm not being nasty, I'm serious. If you need a solution right away, there is nothing wrong with facing reality and finding a fix. TODAY, unless you feel like flipping down the back seats, shoving the kayak inside and using bungee cord to hold the hatch door down, your options are limited.
And yes, I have disposable income. So do you if you're lugging kayaks around. If you are actually contemplating trading off the Murano and taking an $8000 loss (I doubt it, I think it's just dramatics) then I have proposed an option that's less expensive than taking an $8000 loss.
Namely: install a hitch and get a utility trailer. Got any other solutions you can put into action this week? Hmmm?
As I pointed out, you can resell the trailer and recover some of your money. I realize that's not attractive, but it gets you on the road immediately. This may also be a solution for Freedom55, as a light trailer may be a very appropriate way to carry lumber for projects.
Or you can continue to complain about Nissan abandoning its owners, etc. I realize you're frustrated, but I don't see many alternatives if you want an option other than waiting until Nissan comes out with crossbars.