I can see that. I probably should have said "longer" instead of "harder" (this post is not sounding good!). That example of single stance for extended periods is in line with what I'm talking about, in the opposite direction from what I was pointing to. That's a practice that has benefit, but probably not commensurate with the amount of time spent. If the style in question really needs that stance at that level, it certainly isn't a most efficient path. I'm okay with that, of course - it's a path that suits some folks quite well, and should be there for them.
I was really talking more about what it would take to get through a first fight in MMA vs what it takes to get whatever rank would be 6 months in for a hobbyist. For that MMA fight, a jab, rear straight, and hook might be all the punches you need. Add in a hammerfist for the ground, perhaps, if there's time. Elbows are quick to train, and useful both places, to toss in some time to practice those. Maybe a low round kick (thigh/hip) and a simple front kick for distance control. Don't need either to be great, just to be useful. Takedown? Single-leg and double-leg are probably sufficient, if you even want those. You could go in with just the defense against those (because you can focus as a striker) and a small smattering of other things, mostly using the principles in that set. A couple of basic sweeps and some ground control to bide time to use them, and some time to practice getting shots in from mount and side control. That sounds like a lot, but if we compared to what someone in mainline NGA would get in their first 6 months (depending how fast they progress): 20+ grappling techniques, 3-9 kicks, 4 elbow blows, chop, hammerfist, straight punch, and a smattering of stuff that's not within the testing curriculum, probably including a couple of ground sweeps. Plus some pins, specific defenses to chokes, headlocks, grabs. It's a wide range of stuff. In other arts, you'd replace some of that with memorizing forms and specific combinations. It can get complex quickly. Fewer things to learn leads to faster competence in early training.