NOT! This is a real machine.
Being a lefty myself, it never crossed my mind that the sewing machine is designed to favor lefties. But ...
Well, machine designers thought it would be better to have the right hand, since it is dominant for most people and hence the stronger one, be the hand that operated the crank. This meant that everything else is done with the left hand and still is to this day.
I'm wondering if it is just coincidence that out of the five women in my family, the three of us who are left handed are the sewers and my right handed sisters are not? hmmm ... I would be interested if anyone has an opinion or anecdotal evidence one way or the other.
But, hard as I tried, I couldn't use them. Not only was I having trouble guiding them, the main problem was, I didn't have enough strength in my left forearm to cut for more than a few minutes. I've actually measured my two forearms and my right one is 1/2" larger than the left from years of cutting.