Obviously, the reason why they have weight divisions in competitive wrestling is to reduce the incidence of injury. On the other hand, I feel one hallmark of a skilled Jiu-Jitsu practitioner should be an ability to get effective training from just about any situation.
Along these lines, while Jiu-Jitsu is about efficiency at times, I’m sure you can imagine the force and impact of some one using the front headlock below on some one 40 lbs. smaller.
Therefore, for the sake of wide variety of training partners we encounter on the mat in terms of experience level, body type, and general health, I recommend learning both gentle and direct approaches to scenarios.