>This could very well be false: without sci-hub, people might instead use arxiv and the like; perhaps sci-hub brings journals thousands of downloads they would not have if sci-hub didn't exist.

There was that study in EU that said piracy actually helped the game industry.

There is also what the author was commenting, sci-hub is easier to use than the legal alternative. We go tour researchers stuck in bureaucracies, to access papers funded by taxpayers! As Gabe Newel said, to fight piracy, you provide a better service (Steam was the biggest hit to game piracy, and so was Netflix for series and movies), instead of that, what we see is more control/bureaucracy being added.

edit: https://www.engadget.com/2017/09/22/eu-suppressed-study-pira... it's an old study (2013), but I doubt the situation got worse. In videogame land the greatest example is The Witcher 3, easiest game to pirate, has it was distributed without DRM, you could just copy your friends installer. It was still on the top of steam most played single player game(which requires the key to be unique), won a lot of awards, and got so much exposure that netflix has released a TV show...