It looks like it has a 3d draping view, but it didn't seem very good yet. Check out Marvellous Designer, that's what anyone doing digital-first uses.

Drapey clothing is probably the easiest to freehand without a pattern though. It's accurate fits that need more measuring, planning, temporary stitching, test garments, etc.

How did you determine the author is a PoC? Even now that you mention it I can't find anything in the repo that tells me anything about the author's demographic. That X profile does appear to be the author's, but I'm not sure how you made that connection since there isn't a link to it in the github repo, or the author's git profile page.

Are you suggesting that most people commenting on this, on a site where people often don't even read the linked content are doing more than skimming the github page and saying the first few things that come to mind by taking time to track down the author's posts on other sites to determine their demographic?

What does this have to do with the post?