Many scene groups actually purchased the games and cracked them, I've read NFOs that say "buy the game, we did too".

People recording in movie theatres have to either sneak into the theatre or buy a ticket themselves.

Someone scanning a book to post online had to have bought it or borrowed it.

Yes some games are cracks of illegitimate obtained leaked copies or other unscrupulous methods.

I have played pirated games in the past but my Steam library has thousands of dollars worth of games I bought, many of which I wouldn't have if I weren't interested in these type of games to begin had pirating games not been possible.

Sure, the opportunity cost from piracy's "lost sales" to the publisher/licensor is non-zero. But how many sales that would have happened varies greatly on the perceived value vs. price of the product, and how available it is. If it's not in stores anymore and can only be bought from scalpers on eBay, the publisher cough Nintendo cough doesn't see that money anyway vs. pirating it.