Besides, Remington and Winchester safeties seem made for a lefty.
That is something I've tried to 'show' friends. IF the safeties were on the LEFT side of the gun--where is your thumb-IF- you are right handed? ?
That is also true of hammer EXTENSIONS for revolvers, etc. When you're aiming/shooting, WHERE is your thumb? ?
For righties, the thumb is on the left side of rifle stocks and pistol grips.
Jerry