I can’t trace. Where I heard the words we marry what we are.
Even if they are genetically different, if two people have opposing world views, they are unlikely to be attracted to each other - at least long term.
I love the fact that you brought out that thought. patenting with an individual totally different from you is a solid gamble. However having common ground allows both of you a place you get together in thought and build out solutions for your problems or situations that arise along the way. Away from that point that partnership risks lasting, because there is no ground to solve issues.
Being similar in some aspects can help, but it can also raise issues where rather than discussing larger differences, it becomes picking on small differences.
This is profound. And a large barrier for development