Using things like github stars is clearly stupid, but not in the way you're suggesting. They're using the GH stars as a proxy metric for "someone else will come along and give money bags to this person later, so I should get in early so I can take that money eventually."
They're operating on metric of success which is about influence and charisma and connectedness, not revenue or technical excellence.
Again, VCs don't care if you'll make a profitable business some day. They're just interested in if someone else will come along and pay out giant bags of cash for it later in a liquidity event. If they get even one of those successes, all the stupid GH star watching pays off.
Here's another way of framing it: any harms from the false positives around "He has a lot of GH stars" or "He went to Stanford" or "I know his father at the country club" are more than mitigated by the one exit in 1000 that makes a bunch of people filthy rich.
We shouldn't expect VCs to be something they're not. But we are missing something inbetween VCs and "self financing" and "bootstrapping"
