Dont believe me? Do some research, look at the history of the art! Look at the beginning when Grandmaster Carlos Sr. was trained by the Japanese. Look at what Grandmaster Carlos taught and shared with his brother Grandmaster Helio. To quote Grandmaster Reylson Gracie, son of Carlos Sr., "Although it is true that ninety percent of fights will eventually end up on the ground, ground techniques are just a portion of Gracie Jiu Jitsu. What makes Gracie Jiu Jitsu such a wonderful art is that it contains the strikes and kicks of Karate, the ground fighting techniques of Judo, and the joint locks and throws of Aikido."
There was no such thing as Berimbolos or Imanari rolls. If it didn't work in a real fight with someone also trying to punch or kick you, it wasn't Gracie Jiu Jitsu.