Of course it is - the title says "Piracy Doesn’t Harm Sales", and most sales aka revenue comes from blockbusters. Global box office in 2019 was $42B[1], and the top 10 highest grossing movies alone accounted for $13B[2].
If losing some small portion of their tens of billions to piracy actually helps hundreds of smaller producers to somewhat level the grossly inequitable playing field, then I think the title is fair.
If hundreds or thousands of smaller businesses are allowed to flourish or even survive, thanks to the higher sales due to piracy leveling the playing field a bit, then it would be kinda wild to suggest that "piracy harms sales", as if only Disney matters.
Btw, 10 out of those top 10 films you cite for 2019 were sequels or remakes. All of them came from huge established megacorps - 7 Disney, 2 Sony, 1 WB. My sympathy for them could dance on the head of a pin.
While I also DGAF about disney/sony/wb bottom line, my point is that "Piracy Doesn’t Harm Sales except for companies I don't care about" is not the same as "Piracy Doesn’t Harm Sales."
[1] https://www.statista.com/statistics/271856/global-box-office... [2] https://en.wikipedia.org/wiki/2019_in_film