I think there is. I think they are just speaking from their own experience. They are an authority on their own life experience and know what they've learned but that doesn't generalize. Advice is only right for the right person at the right time.

> The best way to be liked is to just agree with everyone.

This view is incomplete. Human relationships are build on connections. You can create those connections by agreeing with people, but that creates a very swallow connection.

An example of connections is networking: you mingle in a group of people at an event and start or join conversations. Everyone at the event starts the shared experience of being there. After a conversation, you might find someone that works in the same city you do, that adds another connection. And so on.

:)