Does the meat of the palm not smudge along the written words anyway when writen by a lefty?

Not when the lower 1/4 of the pen is in front of the whole hand as is my practice as a righty.

Do you expect the pen, as it is held in the hand, to be facing either left-to-right sideways away from the written text (or versa-vis with a lefty) or slightly toward the *penperson... as it seems with your description of a lefty? My *penmanship always holds the lower part of the pen furthest away from the body, as to not have an effect even if I was scripting in Hebrew.

I may have learned this *clean practice from writing music scores using a #1 pencil.