As-salamu 'alaikum wa rahmatu Allahi wa barakatuh I don't think that's what he meant. Even if two people are good Muslims, it does not necessarily mean that they should get married or that the marriage will be a good one. Case in point the marriage of Zaynab bint Jahsh (ra) and Zaid bin Harithah (ra). Great Muslims but not such a succesfull marriage. There's a lot more to a marriage than that. I think that's what he is saying.