Sounds like you and your wife have a great relationship that works for you, however, I don't think one can simply say that makes a person a better partner or not. As with most things, it depends on the people involved, and their love and understanding for each other.
From my short time on the group here, seems like many of us have excellent relationships with our SO's, however, I know many others that don't CD (at least that I know of , ) and they have GREAT relationships. Even though my wife is supportive, and we've been married 22 years, and would both do it over again, I don't do the cleaning, minding the house, and I'm certainly not a neat person, using the washer and dryer, I refuse to even learn the buttons.
Since we've started to share my CD experiences, I think our relationship has improved even more, but it was great the 1st 15 years also.
I think it's fantastic that you do all that with your wife, and the more people have in common, the better the relationship. I'm just glad my wife is not on this board (yet) and has not read it. I don't want to start to learn how to use the washer and dryer, Just like she doesn't want to go to work every day.