Well, truthfully, to answer Mimi's question, the kind of person who would want their partner to give up something that is so defining for them is a person who is lonely. A person who maybe isn't good at that particular activity, and it makes them feel badly, diminished. When you are so involved in something like racing (but it could be anything) it is all about you. I have known enough racers to know that it takes a certain kind of focus on yourself, which some people construe as selfish.
I know that I am very lucky, that DH and I share a passion, but sometimes, even we think we are a little nuts. That's when we say we want to have a day like "normal people" and we sit on the deck and drink wine. But, I am with my DH all of the time. It didn't used to be this way so much, when we had some separate interests. I rarely, I mean very rarely, go out with girlfriends, although I do ride with a few other people and ride with a group. Because we are together so much, I really would not like it, if all of a sudden he was off doing stuff without me. I would not want to be waiting for him to come home from an all day ride every Saturday or Sunday!
I am just playing devil's advocate. I should add that my DH traveled 4-5 days a week for at least 15 years out of our 30 year marriage. Maybe we are making up for lost time...
2015 Trek Silque SSL
Specialized Oura
2011 Guru Praemio
Specialized Oura
2017 Specialized Ariel Sport