Geezer it's not exactly the same as another hobby, because other hobbies can be done on your own time and aren't dictated by outside forces. It is also not a hobby you're taking part in, you're watching other people play a game from the sidelines.
Now you won't continue to read this
but I actually agree with you for the most part. If it were some thing DH desperately wanted to do, I wouldn't feel like being the person who told him he "couldn't" do it. I'd prefer that he make the choice on his own. However, I'm also the sort who wouldn't mind a holiday on my own with DS (very different from a holiday with 3 DC, I admit!)
I love rock music. On of my favourite bands, I've never seen them live before, they're getting long in the tooth so I won't have many more chances to see them, are finally coming to the UK. A friend and I had tickets, purchased as soon as they were announced last summer. However, in Feb my DF said (very very long story short) we have an opportunity to visit with him, for a very nice long weekend in +Paris, and so I'm taking DS to see him. Because life is short, DS won't be 4 forever and my DF won't be around forever.
The long weekend covers literally every UK date of the tour, btw. :(
Agree with natweb. If you're that into sport, and must keep certain dates free on the off off chance something big will happen on those dates, then do that. It'll save a lot of strife.