In this match we can see a small guy, a wrestler, in a grappling match against a powerlifter who weights more than 300 lbs.
We can see that wrestler is having a huge problems with anything he tries on a huge guy. What do you think how good would some BJJ practitioner do against a someone this size? Would submissions do any difference or not at all?
https://bjj-world.com/bodybuilder-vs-jiu-jitsu-fighter/