Many people do need that initial "this shit is real" check. If you don't tap, I will pop your arm. This isn't karate. The mythos of jiu-jitsu is so much bigger

Many people do need that initial "this shit is real" check. If you don't tap, I will pop your arm. This isn't karate. The mythos of jiu-jitsu is so much bigger than the reality. I say that with all the love and respect of someone who trains! Size matters. Despite what the brochure says. Each belt is worth about 10-20 pounds of weight. At brown belt, sure, maybe she can beat up a completely untrained 180-pound guy, but with 3 months of training the math changes. I'm not saying "It isn't real" in an absolute "it never happens" sort of way. I'm saying that it's not true for 90% of the real-world use cases out there. People should train to be aware of their limits and to be fit and capable. But anyone thinking a 140-pound woman is going to terrorize some 200+ pound weight lifter is delusional and hasn't trained before.