Left handed player but my windows settings for Primary and Secondary mouse are DEFAULT, I use right mouse button to shoot and left mouse button to aim in games, usually I just mirror keyboard controls and that's going pretty well as I bind all my controls, but I can't make Temporary Zoom "Hold. Primary Mouse" instead of "Hold. Secondary Mouse".

Assuming this is an oversight as most people either use left for fire and there would be little need for a Hold Primary or have the windows settings changed.