3) Of course I view certain worldviews as superior to others. If I meet two people, and one of them says "1 + 1 = 2" and the other says "1 + 1 = 3", then the first person's view of mathematics is clearly superior to the second person's. Refusal to accept that any opinions can be superior to others is the ultimate form of moral relativism, which is nice on paper but doesn't really "work". Using this sort of basis is how I decide whether a worldview is "superior" to another or not - if one starts with a premise that, to the best of my knowledge, is faulty or flat-out incorrect, then I'll tend to accept that one whose premises seem far more likely to be correct (all other things being equal between the two) as superior to the other.
I have a relative who is fond of saying, "Opinions are like anuses. Everybody has one."
Typical remark of that person's culture.
But many have the attitude of "That is just your opinion." As though an opinion has no weight and cannot be evaluated for quality.
Yet in truth
everything a person says or believes is their opinion, whether it can be supported by demonstrable fact or not. A person can choose to believe
only in those facts that have been demonstrated by science, and may believe their opinions are superior simply because of this -- But in the end it is their opinion, nothing more, nothing less.
There are in fact other ways to evaluate the quality of an opinion. One of the best ways I know of is to evaluate by the effects, or to put it Biblically "By their fruits you shall know them."
For instance if one believes only that which has already been proven then anything that has yet to be proven will be scoffed at -- Until it is "proven." These people make excellent technicians. They keep the world running as it is. Valuable to society but not encouraging to those who disagree.
On the other hand if one chooses to believe in everything whether it is proven or not, then a person will believe in things that are not now, never have been, and never will be. One the other hand they will be proven right often enough to keep them encouraged. These people have a value to society as well. They keep the curious curious and keep people wondering if there might be something more than what we know.
But if someone chooses to believe those things that are not proven should be questioned and tested. These are the people who become scientists and help society move forward. They also perform a service to society.
Now let us look at a different type of opinion.
Scientists and technicians often tend to believe the 'ignorance' of the 'Believers in anything" should be stomped out, by force if necessary.
If you take that view, rather than the social view listed above, what happens?
Certain people are marked as "stupid" socially "wrong" and certain social conflict will result.
If you take the "social view" that each group contributes to the social dynamic, what happens?
People are accepted for their differences and respected as individuals and social conflict will be minimized.
So do you really believe an opinion is an opinion is an opinion?
Or do you recognize that an opinion can be objectively evaluated whether it can be proven or not?