this says more about YC than this particular founder (lots of these types nowadays): i.e. their process, their due diligence, who is advanced from 1000's of applications.
ie, game the test, game the admission, game everything. and some folks see this as "hustle".
eventually their own process gets gamed.
gaming incentivises a culture of "pretension" - you dont know sh* but you fake it. fake it til you make it. copy code-repos, trample over licenses, whatever, who cares as long as you are getting ahead.
There are some exceptions but the typical demo day is absolutely stitched together from other peoples’ work. The difference is most hide this fact, instead of working in the clear on “open source” without understanding that it is meant to be a contribution from you to the community, because to finance bros that sounds like a joke.
The whole thing has gotten so washed out that they either thought that this is what people actually do, or they thought no one was going to look at their repo (for a coding product!).
Where it's all about the hustle, founder mode, the scene and whatever you can get away with to make money and take advantage of people.