It's interesting, but I don't think it answers the question. I believe life probably started as an autocatalytic set of chemicals which then 'discovered' they

It's interesting, but I don't think it answers the question. I believe life probably started as an autocatalytic set of chemicals which then 'discovered' they could use rna as a backbone/memory. So the reason for the chirality is at a lower level than discussed here. All just a hunch and IMHO of course.