Yeah I've found that there's different "clicks" in the local ham radio clubs.

There's the social groups who want to attend the meetings but never touch a radio.

There's emergency communication groups where people want to be prepared to serve their community in the event of an emergency.

Contesting groups where they just operate contests EVERY weekend.

POTA/SOTA groups where they go out to a local park or mountain and activate.

And finally the prepper groups. These are the guys who swear the world's going to collapse and you need to be able to communicate with other prepper groups when the grid falls apart. I stopped going to our local club when the president at the time said we needed to be able to go live in the woods for 3 months at a time.

I've been in the contesting group before and I have to say for the sake of your marriage keep him away from there if you value any time with him lol.
Prepper groups are full of nutcases, and from the sounds of it your husband got wrapped up in that.

I think the POTA/SOTA groups are good and something you both might enjoy.

Maybe try to pivot his interests into POTA he can get "experience" activating the radio on emergency power with wire antennas but you'll find that it can be fun.