Sometimes that's true but I'm thinking two in unity can be a powerful force also, as long as God is the focal point. Those who marry for selfish reasons will most likely get disappointed.
I think a mom and pop business could succeed.
But there are all these different combinations I find among couples that are interesting.
Eg police officers tend to marry nurses.
Teachers often marry each other then work in the same school.
Doctors each oher also. Almost never do doctors marry nurses.
Writers marry secretaries.
Pastors marry musicians (and the musicians direct the church choir or band)
Architects marry interior decorators.
Accountants marry buyers.
Authors marry illustrators or photographers.
Librarians marry nobody. They marry their books lol. Actually a librarian carpenter combination could work.