That never even occurred to me. My second bike had one front disc and I converted it to duals with reversed calipers. Every bike I've own since then has be dual discs in the front since. (No dual discs in the back for me. That's just overkill.)There are plenty of bikes that have only ONE front disk. That's about as unequal as you can get. And there is no problem with these one front disk bikes.
Save you money and run whatever disk on whatever side you want !!
Single disc front bikes are still made today. I never woulda thunk it.