i would say that knowing how to get grips on someone trying to prevent you from doing so, and to break grips that have been established would be extremely valuable skills, especially for a judoka looking to apply their training in a self defense situation.
what's your judo rank? how much do you compete?
I am no Judoka. Got some months only of training in Judo. Train in Sanshou and BJJ.
My opinion is based on the short, but that happened, training in Judo with some comps at white belt level, my training in BJJ which includes some BJJ for MMA and SD, my observation of both Judo competition and MMA participation of judokas including Combat Sambo which is done in the gi and, most important at all, logic, common sense and by watching plenty of videos of street fighting and live performances of drunk people in pubs.
Ask one of your biggest friends to try to knock you out by punching then try to apply what you are saying about gripping against him then you will understand why it will not work.
you could guess, but it's a guess. i have taken some BJJ, but don't regularly practice it or compete, so if i was to try to make definitive statements about rule changes in BJJ, it would be absurd, and i would come off like an arrogant asshole (like you just did)
If you made any comment about a BJJ rule, I would just point out that X will result in Y instead of trying to act like an expert in using BJJ for self-defense as my self-defense training is limited to some classes oriented for that per year and zero bar brawls, which I doubt you even have the equivalent in your Judo class.