This is why joysticks are such a saddle-point in the UI space: motion controllers are great for novelty, but the industry keeps gravitating to joysticks and buttons.
And the "exhausting" aspect can actually be a good thing. It means getting some exercise while doing something fun. I was surprised how well VR exercise actually worked for me when I tried it.
I agree with shadowgovt above, in that; yes - motion controls aren't meant to be used all the time, it absolutely gets exhausting.
But on the other hand, you're completely right as well - I'm also very impressed by VR exercise, and games can be a very effective tool for exercise, especially for a nerd like me who finds motivation hard.