First of all, I included numbers from wiki. Not the best source, but I'm not willing to spend more time on this. HP books were not AS popular. Maybe I have an unreasonable standard for books, but it is what it is. Roughly 15 mills after an unbelievably successful and popular movie came out. Now, if we were talking 15 mills before the movie, I would concede on this one, and say it was immensely popular.
Second. I used this as an example of how a movie can bolster the sales. It was 15 mills after the movie that just came out, and now it's 100+ mills of sold copies. That's why I asked for the same numbers for LoTR. How much was sold before the movie, and after. I made a quick google search, and looked through wiki briefly, but either I missed it, or there was no info like this.
Third. LoTR was a niche thing, since fantasy was a niche thing. I'm not as old, so I can't give my take on this. I can only repeat after each and every older person I've listened to. All of them say that fantasy has been a niche thing. Sure, Tolkien revolutionized or created a new genre, and inspired a plethora of creators; be it manga artists, game developers, or writers. Yet all of it was niche, nerd things that were looked down upon. I heard this take from multiple people, not personally though.
Fourth. Unless I get numbers that prove me wrong, I will think that Tolkien made a new genre, or revolutionized the old one. Yet it was Peter Jackson who made it mainstream and popular.
OP writes. There are many videos these days talking about him and the DragonBall franchise these days, and how it introduced Western audiences to anime at scale.
All of these are statements that nobody can argue with.
In my opinon, as long as I don't get numbers I ask for, it was Peter Jackson who introduced worldwide audience to fantasy at scale, not Tolkien.