Let me get this straight. If you are a pessimist, and you have a large platform to spout off your opinions to thousands of people, and in some cases millions, then you have the right to believe you are right and anyone who has a different point of view is wrong.
However, if you are an optimistic person, and you have a large platform to speak your mind to thousands and millions of people, then you are likely to be attacked by the pessimist I mentioned above. You are going to be called naïve, dumb or just plain ignorant because you believe something different than they do.