How much of the science we think is "pseudoscience"

The science we are talking about now is pseudoscience, or relative science, because it is judged from our subjective standpoint. At present, the limited knowledge and cognitive level can not reach the realm of understanding real science. As you said, many supernatural phenomena are considered unscientific by so-called experts, who just stand at the current cognitive level. From the perspective of aliens, science on earth may be a childish children's game, which has nothing to do with science and technology. Of course, this does not mean that the science of alien civilization is real science or absolute science, because they are also confined to their own cognitive scope, and the truth of the universe cannot be fully understood, and they can only reach the realm of close truth rather than absolute truth forever.