It’s not the view obscuring that’s really the problem, though it is a side effect. It’s the pressure exerted while squeezing that only works for the correct hand in scissors.

If you can figure out how to contort your fingers to squeeze the blades together enough, you can use the wrong scissors, but I just learned how to cut righty because I could never find good lefty scissors as a kid. Same reason I used the mouse righty.

By the way: The view of the line is going to be obscured cutting curves in the direction of the cutting hand no matter the side.