Now that's never been a matter of dispute between the two of us. She's much more ambitious than I am, plus I totally love children and have certain health problems that probably make me more efficient at home than as major bread winner. I've never seen my goal of life in status or power anyway, but I'd be really proud if I manage to bring up our kids well.
Neither my wife nor I consider our marriage a limited companionship, but are very traditional about the "til death do us part" thing. So yeah, maybe we're not statistically the norm, and I certainly don't judge other people for their choices, but I don't think roles diverting from traditional roles necessarily mean limited, not-so-serious relationships.