My wife enjoys day hikes, usually 10 to 16 miles in just about any kind of terrain. She never has and is completely unwilling to sleep on the ground. She especially enjoys camping in our tent trailer in remote sites and day hiking.
On the other hand, I prefer backpacking. So we do a lot of camping together in the popup, and do day hikes together. All my backpacking I do alone. This works out perfectly.
Would I like her to go backpacking with me? Absolutely. Would she enjoy it? Probably not. So I do not even try to inspire her to try it. As a matter of fact, if she changed her mind, she would need to present a compelling case for why she should go with me. Because I want her to provide her own inspiration in her life, not rely on me or anyone else to inspire her.
Does she live a full life? Yes indeed. Is she missing something? No, not in her opinion. And for her life, she is correct.
One thing I have learned in my life is that it is not good to try and change a partner. Now if you come up with an adventure that sounds appealing to your partner, that is great. If it does not sound appealing, do not try to force the issue.
Examples. A few years ago, I wanted to get a small inflatable boat with a small motor to explore some of the sections of the Colorado River (not whitewater rafting). The goal was to operate out of a base camp and then motor back at the end of the day. She was hesitant, but game. So we got an 8'6" boat with a 2.5 hp motor. Since the Colorado was flowing at around 5 mph, and our top speed was 4 mph upstream... well it was a difficult and long trip back. We needed to "serpentine" back because going straight did not work. We got back just as it was getting dark and we were exhausted. But she had a blast. And it was her suggestion to get a bigger boat and a larger motor. Actually she would have let me buy a huge boat and motor if I wanted. So we got a 10'6" boat with a 9.8 hp motor. Plenty big, lots of power. We enjoy day trips and paddle through still lagoons watching wildlife. To be honest, although backpacking is my passion, I would rather spend a weekend with my wife in the boat. And talk about inspiration... we were near Blythe, CA one week exploring on the water. Blythe is about 120 miles north of the southern border. Hot desert. On weekends the river is a speedboat/jet ski nightmare. But weekdays are pretty empty. So we are floating down the river, and in the reeds I see what looks to be a beaver lodge... in the desert! So we anchor and sit for a while. I don't tell her what I expect to see. She is looking around at the birds. It is late afternoon, and guess what? Yep, beavers. 3 of them. We watch them for maybe an hour. I am sure 1,000s of boaters go by this every year and never even know. But we had an amazing time.
A few years ago she wanted to go on a Caribbean cruise. Not my cup of tea. But I went and had a great time. I won't be doing a lot of cruises in the future, but once every couple of years with my wife will be okay by me. I would never do a cruise without her. It is more about being with her, than the cruise itself. And when the ship did the day stops, we skipped the shopping excursions and did hikes and other outdoors stuff. Great fun.
I guess the bottom line is that I do the solo things that inspire me, she does other things that inspire her, and we share the common things that inspire both of us. Most importantly, we do not let life get in the way of living. We both work hard and put in a lot of hours. But we go on some adventure nearly every weekend (separately or together), and we spend about an average of 30 vacation/holidays outdoors every year, both alone and together.
It is easy for partners to balance their lives, enjoy the common passions, and not lose your own inspiration.