an occasional comment, constructive criticism, or helpful guidance isn’t cause for alarm.
The thought that one should "never try to fix their partner" doesn't seem like particularly good advice. While one doesn't want to constantly hector their partner, everyone has things they need to improve upon in order to improve the health of the relationship. If you refuse to address one of your partner's habits that is making you genuninely unhappy, simply for fear of looking like you're trying to "fix them", you are only increasing the chance that this habit will eventually grow into an unresolvable problem down the line, and therefore put the relationship in peril.
