Because I don’t like people looking over my shoulder.
For me, I need to run look at my code, stare at it, change the variable names a few different times, decide what case I’m doing today, refactor a bit here, do an F5 on the simplest of changes and then when I think it’s all done.
I’ll stare at it some more and wonder what I should do next.
In short, I would drive the person beside me crazy.
And that’s before I’d have to give you control of the keyboard.
But that doesn’t mean that it won’t work for you and that’s the beauty of it.