Possibly true, but I think beside the point. You are holding parapsychologists to a much higher standard than the rest of science (except physics.) That's what the entire article is about really.
You mean, except physics, chemistry and biology, i.e. sciences that are based on numerous, replicable, measurable, non-subjective experiments. In contrast, economics, psychology, sociology, and even medicine (at least the parts that are not performed in a lab, such as biomedicine or molecular biology) are not really sciences, but merely studies.