Should you change because someone else wants you to?

Matt Walsh explains the Cardinal Sin in any relationship is that you shouldnt try to change someone else. You should put up or overlook your partners flaws because you love them for who they are. He goes on to talk about how men and women are different in their attitudes toward their partner. Matt explains a quote attributed to Marilyn Monroe that highlights you can't handle the worst of someone, then you don't deserve the best of them.