You missed the part about having to ratchet back and allow them an opening. I can't take it to the point of the break. For the techniques where there's a base to restrain them, it can be used as a submission. But some don't contain that base, so in order to be destructive they have to be used fast and hard. If you back off, the opponent can move out of them if they choose to ignore the reason you backed off.Then it is not too destructive or deadly to spar.
I keep hoping I'll find someone who has a very similar version that provides a base for submission. That would open those techniques up more. I'd give up some of the destructive capacity for a bit of submission control (useful in sparring and another option in defensive use). I've seen one of them in a Judo book, and maybe even in a BJJ video, but if the opponent has any knowledge of the technique and you stop before the destruction, it's pretty easy to counter - and things go badly from that position. Another I've seen used as a takedown (ostensibly instead of a break to the hand), but I've not found anyone who could make it a takedown if I stood up, doing it slowly. Doing it fast, that standing up drives into the destruction - can't verify that at speed, of course, without risking the break.