There is no "unless". They can if they are willing. The only reason it can't be is if one or both people are somehow unwilling, and what you have described here is an unwillingness, when you deem the compromises necessary are too great.
It would be difficult for many couples, but there's always that possibility, of course, given the willingness to do so.
I think I've repeated myself enough times. Thanks for the convo.
