1. YC has no problem filling up Demo Day, and I know of even high qualify, professional angel investors who don't get the in person invite. So it isn't like they have a shortage of angel investors. If they wanted to have more and more diverse angels at their event, they could just find a bigger venue, which YC seems averse to.
2. Isn't this a big conflict of interest? This is a company teaching me the basics of angel investing who conveniently happens to directly financially benefit if there are more angel investors pumping money into their companies. Now I'm sure the class will be done well because YC generally does that, but I'm surprised YC is even wading into this. Angel investing is either a bad or at best extremely risky way for the average (even rich) person to invest their money in. Hopefully YC has a lot of disclaimers at the beginning of this class about this fact. I'm all for more information being out there, but angel investing is the type of thing where depending on which facts you omit you can make it seem very different from what it is.