Earlier quoted context omitted.
I doubt that, as we left-handers are made up of the same sort of molecule as everybody else.
Haha no, I think you misunderstood. I meant the underlying reason for human to have a preferred "side" is probably the same reason that life has a preferred "side" for chemicals. Both humans and enzymes can be chiral, i.e. asymmetrical so I think they might be connected. Don't worry, I am not an atom-ist or a chiral-ist. All sides are equal! (except the ambidextrous master race :D )
I suspect it's different, in that I expect the reason for people is something like "handedness makes people better at violence". Whereas I suspect chirality is more like driving on the right/left side of the road. Which one you pick doesn't matter, but picking is less chaotic than not picking.