Almost no sites require a form of login.
You can login to most sites, but primarily so that you can keep a persistent pseudonym and set preferences. You can browse almost every site without logging in. There is nothing that stops you from e.g. linking to a YouTube video from your own site regardless of whether you have a YouTube account. For Facebook you need an account to even see the large majority of the content.
> So, the openness that I think people want, is access to the Facebook user base, but I would argue that everyone already has that, in is the rest of the web. The difference is Facebook is not going to give that to any other companies, because that user base is their revenue stream.
Which is why people dislike them. Who wants to be somebody else's "revenue stream"? Replacing Facebook with a decentralized social network that no single party controls would be better for everyone but Facebook.