In my mind being a hacker is something very anarchist/left libertarian coded. Hackers don't try and get laws passed to achieve their goals, they do it themselves no matter if it's legal or not. Activists fight for right to repair, hackers jailbreak their device and publish the keys. We need both to fight big tech effectively.
Copyright is not a hacker thing because it restricts peoples freedom to share and hack on anything they see. Now abusing a bad system to do something good, as you said, would be hackery. But that's not the same thing as supporting copyright as it is right now or wanting to expand it. It needs to be in the spirit of "we turn their own tools against them". The ultimate goal is still eliminating IP laws as far as they limit individuals free speech.
It would be different if it was an asymmetric system. Protect creators from companies trying to make money off their work, but not the companies from users taking their profits. That would mean switching to a form of copyright that only applies to commercial use and abolishing work for hire / any form of rights assignment as opposed to a license. That's one idea I can get behind.