You’re absolutely right. But the thing is, most people AND their parents are very careless about this point prior to the wedding. Before the wedding, everybody is like “oh she’s SO pretty” or “oh he’s a DOCTOR” or “their house is beautiful” or “their family is so lovely” etc. And that’s ok. You do have to consider things such as “will he be able to support a wife” or “are they attracted to eachother” and “what’s the family like and will they be good to our child.” But what ends up happening, IMO, is that people ONLY consider these things or they only consider what they like about the person to the exclusion of any negative qualities. And if they even give a thought to the boy or girl’s negative qualities - they will tell their child not to worry about it because “all that changes after you get married.” Which is a big fat delusion. Very little about the person’s personality changes after marriage.