Why are most rudder controls on the left?

[duct tape]

First post here. Been researching for over 6 months looking to get a kayak. I'm able to answer most of my questions reading BWE and watching all the kayak reviews on youtube but this question I can't seem to figure out.

Why are the rudder control on the left and not on the right from factory? I know PA's and WS Radar have the option to move the control to the right side and OB having dual control but is there a reason why most are on the left?

BTW, I still can't decide on a kayak. I'm starting to lean on the side of getting a used PA 12 over the rest as my first kayak.