My fiance has a bunch of non-life-threatening food allergies, but I still eat whatever the hell I want. I'm just discreet enough about it that it doesn't upset her.
I'm reminded of a time I was at the local game store and somebody was putting all their old dungeons & dragons stuff up on auction because his fiance wasn't a fan. I told him straight up to his face to get a divorce. If you have to change who you are or give up what you love (That's not harmful) to appease someone else, they're not the one for you, I don't care how good the sex is. This was a long time ago and I would not be surprising to learn that the marriage lasted less than 5 years tops.