Wow this is a hard one. He doesn’t like it because you will be in a bikini on stage not due to the impact it has on the family. He is insecure. It isn’t a concern for you or family so I think he is being a dick. But…
It will impact him and the family. I say this as someone who has been a competitor and has many friends who have done it or used to it. There’s absolutely no way you can be stage easy all the time. Even for the older ranges or athletic range.
getting stage ready is a year round commitment. And the weeks leading to competition are brutal. The days before are awful. Competitors lives become entirely focused on the competition. What’s eaten, what’s drank. Making sure you dehydrate the day before. Body fat so low it’s in dangerous territory. People who are almost stage ready, tend to have the focus on food fitness above all else. Body building competitions are full of people with orthorexia who are convinced they are just being healthy.
Maybe you are the unicorn. A woman who easily drops body fat, whose body easily shows definition with a lot less effort than everyone else needs to put in. But more likely, it’s taking more focus and effort than you realise or are willing to admit.
I have seen many relationships end, due to one’s person obsession with competitions. Both men and women. The one doing them often doesn’t realise the impact.
If Dp, decides to do competitions again (he did when younger) I wouldn’t want a relationship with him. Having experienced it, it’s not for me.