It beats having the exhaust on that side.

Once you're plugging it into something, you won't be using the laptop screen anyway.

I am rightly, but a few years ago I tried to use the mouse with the left hand. To my surprise it took just couple of days to adjust. Clearly with the right hand I could press buttons faster, but the precision of mouse positioning was just as good.

The precision required for a mouse is very low compared to writing. So it's mostly preferrence or what is set as default.

The previous poster was referring to the cables on the right getting in the way of using a mouse to the right of the unit, not that you couldn't use any the right ports for putting a mouse in