Spoof -

I'm a left-hand tyer myself and usually I do a few half-hitches at the end and don't bother with a whip finish at all.

Most tying instructions assume a right-hand tyer so wrap directions are geared to them. Don't get hung up so much on the DIRECTION of the whip finish. The concept here is that you want to wrap the whip finish the same way as you've been wrapping the thread on the fly. So a left-hand tyer is wrapping the thread on the hook in a counter-clockwise direction (using your left hand to wrap the bobbin) so when you do the whip finish using the Matarelli tool you'll wrap that in the same counter-clockwise direction.

I know there are issues with how thread is manufactured and the twist that forms during the process. And I've read a left-hand tyer is actually 'unwinding' the thread as they wrap on a hook but IMO I don't know how much it really affects the tying process or the end result. And you can always spin your bobbin to re-tighten your thread if necessary.

And remember, us lefties are the only one's in our RIGHT MIND!