Different activists are different. "Information wants to be free" activists are against different things from "artists trying to make an honest living" activists.
And different big guys are different. A big guy AI company wants different things from a big guy book publisher.
The activists are against it because the big guys are exploiting us small guys, again. Nobody would give a shit if Meta was just torrenting Nintendo's IP and OpenAI was torrenting Netflix IP, except the lawyers working for these companies.
By the same token, AI companies are in no position to complain when their models are scraped and distilled.
https://www.nytimes.com/2015/05/05/sports/periscope-a-stream...
Oh no, its just legal for the big companies. The laws are different for everybody and that's what activists are worried about :)