Yeah that would solve this usecase but it does not solve other usecases. Or…at least it would be rather strange workaround for other usecases.
For instance I have a flow in which I tell google to ask Homey to increase the volume of zone 2 of my Marantz receiver. In your suggestion I would have to make a VD (eg. zone 2 volume) to trigger this flow and tell google to turn on this device: ask Homey to turn on zone 2 volume
Thats rather strange in my view, and not logical to explain to the rest of my household.
Note that I have additional flows for: in/decreasing volume of main zone, in/decreasing volume of mian/second zone a lot! etc etc.
I would have to create VD’s for all of these flows and use strange commands, like the example above.
I’d rather use logical sentences and maybe somewhere in future Google stops given me hints…