My objection is that OpenAI, at least to my knowledge, still is a non-profit organization that is not part of the government and has some kind of public benefit

My objection is that OpenAI, at least to my knowledge, still is a non-profit organization that is not part of the government and has some kind of public benefit goals - that sounds like an NGO to me. Thus appointing “NGO types” to the board sounds reasonable: They have experience running that kind of organization. Many NGOs run limited liability companies and for-profit businesses as part of their operations, that’s in no way unique for OpenAI. Girl Scout cookies are an example.