Under the same Restricted Content scheme, Google also flagged LGBTQ+ videos (https://www.theverge.com/2018/6/4/17424472/youtube-lgbt-demo...). I don't think anyone argues seriously that the company's politics (in general) are at odds with supporting LGBTQ+ causes and people.

It may be worthwhile to ask not what YouTube wants, but what the audience for these features wants. Are PragerU videos restricted because most schools think they're worthy of restriction?