The most toxic advice you'll ever get is that healthy relationships shouldn't require any work or effort. This sort of mentality is created by those people who speaks from a place of hatred.
No matter how much you love your significant other, or how aligned you are in goals, values and beliefs, there'll always be part of yourselves that doesn't agree with each other. There'll be some friction,but its purpose is to make you aware that there might be needs that haven't been communicated yet, or one of the partners has some healing to do. Arguments are beneficial if done properly - with care, forgiveness, compassion & kindness. Work together to solve the problem, don't compete against each other for who is right or wrong. That's not the point.
The essence is to use those moments to learn how to love harder and better. It's the only real manifestation of a healthy relationship.
-