Exactly this. The problem with most SD stuff and even LEO based stuff is it's not trained with resistance at ANY level, much less a high level.
Hens teeth indeed.
At least BJJ, even if trained with restrictions, is trained properly against resistance, so you might actually be able to pull some of it off when it counts.
That goes to the individuals. Guys that are uninterested are still gonna brother in law it even if you put them in bjj