Listen just because your ignorant about Brazilian Jiu Jitsu and think that it means you have to connect and stay connected while rolling around on the ground with a person for an entire confrontation isnt my fault..
Learning positional advantage, how to pass an opponents limbs, how to lock, dislocate, or break limbs, and choke an opponent out does not have to be done in a horizontal position.
keeping a body between you and other attackers as you dispatch that person is also fairly easy to do using skills taught in Jiu Jitsu.
We also have many takedowns.
Combine that with most human beings abilities to punch, push, pull, poke, bite, etc. and an ability to think... you might be out of luck there.... and you can form a fairly formidable defense against multiple opponents... at least close to as formidable as most martial arts can.
If you want to condescending and act like a know it all, at least do it about something you have actual knowledge of.