I agree with the grandparent comment. And it is because of separation of concerns. You can put it in the same basket as freedom of speech, but it's a bit different.
A browser is a browser. It does not have to promote a moral view. In fact it has to provide ways to find information. Not to limit purposefully ways to find information.
A browser is a browser. It does not have to promote a moral view. In fact it has to provide ways to find information. Not to limit purposefully ways to find information.