>>725233862
Not quite.Regular jujutsu, as in Japanese jujutsu, had a lot of historical mumbo jumbo and various different schools teaching different stuff.
Jigoro Kano decides to clean it up and created judo to focus on techniques he believed to get effective, in big part that they worked and but still could be safely trained with a resisting opponent.
Brazilian jujutsu is an offshoot of judo, but with the way they developed, while judo focused more on throws, bjj focused more on the ground game.
Because of bjj's involvement in mma and the gracie challenge, it got some hype. Big part of it is that if you want to compete in mma, you need to know ground game, because most fights will end up there and without it you're fucked. However, you can substitute it with other grappling arts (for example, Kimura vs Gracie or Sakuraba vs Gracie), and once you got some understanding of ground game and how to work there defensively,, you can focus on other areas and it's not that dominant (pretty much the modern mma).
Also sport bjj continued to develop and the goal to focus on the ground game left loopholes in the ruleset which led to development of dumb fuckery like op.