Kudos: afaict, yc is a "good actor" in contrast to "bad actor" VCs that have received recent notoriety
yc does its part in putting out knowledge into the world re: how to build startups (cynically, this is to promote brand, PR)
yc funds non-profits
yc promotes diversity esp relative to its SV peers
Criticism: yc is elitist. with a few exceptions (you have PMF), you have to know someone
yc is incredible for the 1% that get in, to the detriment (broadly) of the 99% that don't. they get a disproportionate amount of attention, capital and support
yc is a VC firm (+bootcamp), but with a vastly superior economic model, which is pretty incredible given how good VC economics are
the part about it not being about the money rings hollow. my guess is it's 90-95% about the money. YC partners have made hundreds of millions (in the future, YC will probably mint a few billionaires) of dollars. every batch, 7% of the equity of 100-150 "cream of the crop" startups goes to a handful of partners. if YC's primary goal was social impact, the batch would look a lot different -- not saying yc doesn't do good, but i think a typical VC is at least straightforward that their goal, and fiduciary responsibility is to make $. i think YC sugarcoats this for branding purposes when they de-emphasize this.
the narrative around SV has really taken a turn for the worse. income inequality is a real problem, and also getting worse. one could easily argue SV is exacerbating this, and YC is a factory of many of the startups causing this. the future is already here, it's just unevenly distributed