There it is again. You're assuming we just wait for it. In NGA, we use strikes and other tools unless and until the aiki openings show up. And they do, far more often than you seem to think. Beginners make those mistakes all the time, often when they try to stop someone more experienced from doing a technique. And I have good reports from police officers I trained under and alongside that those opportunities show up fairly reliably even with people who are resisting.You keep thinking this golden opportunity will somehow just come along.
And for some mysterious reason your training partners keep denying you this.
That is not a big surprise.
It is unlikely to happen in a street fight either. The other guy denying you the golden oportunity is pretty much half of fighting.