BJJ is not all on the ground, depending on the instructor, some do teach stand up, and yea, you may know how to not get taken down, but realize the opponent knows this too, and will find ways to take you down, its a chess match, every style has pros and cons, KNOWING the pros and cons and how to take advantage of them wins fights. If skill is equal, then the best srongest mind wins. It is about control and I agree to be real well off you need to study stand up and groundwork both extensively. remember Hoyler Gracie, he fought many kickboxers and stand up fighters who trained forever how not to get taken down, and know what??? he was 401 and 0, (Wins Vs. Losses). He ahd a stronger mind. Also his fights were one on one, don't take a fight to the ground if it is not 1 on 1... Bad Idea, But i love BJJ, fixing to start Kickboxing