The fact that when it comes to relationships there really is no such thing as "right" or "wrong" per se. There is only "agree" and "disagree".
If we are involved with someone who disagrees with us on the major things in life then it's possible they may be (wrong for us) but that does not make them "wrong".
Things your partner does that annoy or hurt you may not bother a different person.
Everyone wants to be loved and accepted for who they are. Ultimately we're all looking for someone who "agrees" with us. Opposites may attract in the short run but "like attracts like" in the long run.