I do not think that anyone can dispute that not sharing your SO's passions on some level is not a good thing. Over simplifying the comment with outliers does not negate the validity of the comment. If you are with someone that is the most awesome person in the world and the fact that they do not share your central passion can be over looked you are not the norm you are the unusual and as th OP said consider your self very lucky. Although, if people were completely objective most would admit that it would be better if their SO did share their passions, regardless of how good there relationship is now.