> sometimes for example having my forearm lying in front of the keyboard.
But you can still reach space or right command key with your middle/ring finger? That would allow you to use 1 finger to drag, not worry about lifting your dragging finger while dragging and get more range
> What doesn’t make sense?
You listing that gesture as some kind of alternative while the default is already 1-handed
> I don’t see the downside either.
The downside is that scrolling with two fingers might misfire when you change your mind and cancel scrolling right away, so place 2 fingers and lift them up, thus triggering a right click
> so far I don’t see a strict ordering that applies to everyone or even every situation.
And you'll never see it with your eyes closed. You need to actually try this stuff to be able to judge it, to see whether you drink coffee often enough as a % of your computer time to make the worse gesture better because it frees up your hand and the other one-hand alternative is not as convenient, or whether the mistakes of breaking a drag gesture on a bunch of files/objects in a graphics app leaving them in the wrong place are bad enough
> Still possible with the keyboard
While drinking it? When using the mouse, I’m often relaxed, sometimes for example having my forearm lying in front of the keyboard.
> > with only one hand (including right click: two fingers),
> This doesn't make sense, literal right lick is 1 finger of 1 hand, same as bottom-right corner tap
What doesn’t make sense? Right click is two finger tap for me, which is super common. I don’t see the downside either.
Your way has advantages, my way has advantages, so far I don’t see a strict ordering that applies to everyone or even every situation.