Every carpenter I know or have seen on YouTube uses a circular saw with the motor to the right of the blade.
There are uses for saws with blades on the other side. Rafters, plywood, bench top work. Most track saws are left hand operated.
Here’s the basic process I taught my sons:
You pull out your speed square out of your left hand pouch with your left hand and lay it on the work. You pull your tape with your right hand and move the square under the tape to the desired measurement. Then holding the speed square steady, you stow your tape, grab your pencil and mark a line.
Ditch the pencil, leave the square, get your saw with your right hand, line it up with the pencil line. Then bring the speed square to the saw‘s base with your left hand to guide the saw square. That’s how it’s done.
I have a chop saw on my job site, but still use this basic carpentry technique 100 times a day. Chop saw is really not faster. I do sometimes use it for framing, but really mostly for trim,