[falcolas]

The actions are a bit more like

"move mouse to this 100x100 pixel square, click twice within 100ms"

"move mouse to this 20x20 pixel square, click once"

"Move mouse to this 100x1000 pixel rectangle, click once"

"Type text at a rate 1/5 (1/2 if you're particularly fast) speaking rate"

"Move your pinkie (your weakest finger) to 'ctrl' and click, move your index to 's' and click, release both, verify it worked with a visual cue then either another 20x20 mouse maneuver, or "move your thumb to 'alt', and your index finger to 'f4' (assuming you have access to the function keys), click and release"

Moving a mouse to a very specific spot on a screen is a relatively slow - and hard if you have any motor control issues - task.

[wnolens]

You're right. But OP didn't understand why it doesn't exist because "market is so big."

I presumed they meant more than the extreme edge of RSI sufferers. So I ran the thought experiment.

I've had a mild RSI. The solution was get fancy ergo mouse/keyboard/desk/chair, and retrain myself. I've even seen a guy use a joystick instead of a mouse.