Why are arcanists left handed?

[kikix12]

Most people are neither left nor right handed, actually. Most people are right-dominant or left-dominant. That means that we are right-handed or left-handed in most situations, but the reverse is true under certain number of cases.

For example, I turn the light bulb with my left hand if possible, but use screwdrivers and wrenches with my right hand if possible.

It's just that the characters we have end up with their hands dominance being different among the different weapons.