Maybe I'm in a certain type of bubble, but I kind of feel like that's a secondary goal (for many of them), while the first is finding and keeping a position that lets them earn enough money to survive. Some of them are lucky to be able to do both, but quite a lot of them are sacrificing the "pursuit of truth" because otherwise they wouldn't be able to feed themselves by working as a researcher.
There's a long list of researchers who have done horrible things in pursuit of truth. Research ethics exist to remind us that, yes, other things matter.
Are you aware that you're not paying the authors, but paying the journal, who usually don't pay the authors anything and even demand payment FROM the author to publish their article in the first place? This is not like buying a book, journals are leeches with morally indefensible business models.
Have you ever spoken to anyone who works in academia? Because almost everyone will tell you that they couldn't care less if people get their articles from SciHub. Academia is much uglier than you're romanticizing it to be.