In Zen, they say: “don’t seek the truth. just cease to cherish opinions.”
what does that mean?
To me it means to let go of identification with your mind. Who are you beyond the mind then emerges by itself.

From personal experience, I find that when I say to the other person, “lets find out the truth, IT’S not important about who is right or wrong”, it still is coming from the ego, my ego. I am confident that my point of view is correct. Buddha is saying to give up seeking the truth, it causes suffering. This is the mind wanting to solve a problem which it created in the first place. The ego does not want to solve a problem.
THE ego loves to fight people with their opinions because it is considered to be an attack. THE ego cannot tell the difference between a verbal attack and a physical attack. That is why is defends itself as if IT’S life depends on it.
Buddha also says that wherever you go you will find people WITH opinions. You can fight with everyone you meet. But nobody’s opinion will hurt you or kill you.