Yes, it has people with degrees, but no, it does not have many rich people. It has a few, and if they buy not-too-expensive houses and seem Pittsburghite-friendly, they are venerated. It did well in the recession because its economy is based on education and healthcare; this does not make it particularly good for startups.
Yes, it compares well to other cities of its size startup-wise, but we're comparing it to SV, which is not of its size, so nevermind.
Yes, there do exist nice restaurants, but we're comparing it to the Bay Area, and the mean, median, and top 10% quality of Bay Area restaurants is ridiculously high, so nevermind.
Pittsburgh's weather is worse than Seattle's. Yes, it is #2 to Seattle's #1 on the country's least-sunny list, but in Seattle, it just rains a lot, and whether or not it's raining, the air is palatable. In Pittsburgh, it's either freezing your nose off or making your eyes water with humidity.
The thing about being morally opposed to rich people is an instance of an observation I've heard from multiple people other than myself: Pittsburgh's message seems to be, stay here and be one of us, and don't think you can be any better than us, because we don't think that's possible, and in fact find the idea offensive.
Which is not exactly a startup-ish sentiment.