Guess I did misinterpret your post! Sorry.
I so agree with you about the weak becoming "strong" with principle-based martial skills. Again, brute strength is not the card that trumps all, by itself. However, I don't believe that they are an equalizer when you pit said person against a larger, stronger person with comparable skills. But fortunately, off the mats the weaker are more likely to encounter those who do not have their skills. That's why, historically, small, weak people have been encouraged to train in martial arts.