I think two things get conflated here: interest in
aviation and interest in
flying.
For us on this forum the two are largely one and the same - not so for our partners. My wife doesn't have the slightest interest in aviation, IOW she doesn't care one jota how an airplane works, what the intricacies of flight planning are, etc, etc.
However, she loves to go flying! By which she means 'going somewhere', a local bimble isn't of much interest. Here, there is a happy confluence of interests, as I pretty much feel the same and only 'bimble' to stay current if no bigger trip is happening. Guess I'm lucky, as we even did our honeymoon in a Cessna - which involved considerable planning as it happened in southern Africa. There is, however, nothing quite comparable to landing at a lodge in your own airplane..... which wifie is more than happy to attest to
I'm not sure if this applies to many other ladies, but emphasizing the pleasures of private flying over the general interest in all things aviation may, just may!, help.