Genkaku is probably the most-reviled rule in tournament Taido. Players hate it. Judges hate it. In fact, most judges never force genkaku in jissen. Many tournaments explicitly forbid it.
I don’t think genkaku is all bad, but it’s definitely not my favorite part of jissen. I’m more into the meat – the part that involves hitting people. However, I can see some value to training genkaku and even in occasionally using it in jissen. After all, it was good enough for Shukumine…
Could it be that genkaku has some meaning besides giving people a chance to flip out like ninjas during jissen?