Perhaps some scientist are not interested in spirituality? I don't think we need to invoke the great Conspiracy Theory Toothbunny here.
With things like Psi, every attempt to study it fails. Why would scientists keep trying to study something that they simply cannot or which they may have disproven? Even these facts are meaningless; in truth, many studies actually suggest that many humans believe their minds can control or influence external events, even when this is shown to be incorrect. It would seem to be ingrained in us to assume psi powers given the immediacy and potency with which our mind enacts changes in our unique internal worlds.
Note, that I don't think these sort of things have been disproven by science, but just that they have eluded study and are perhaps not something fit to be studied. That doesn't specifically speak to their truth or not.
Perhaps the entire world is actually a giant
placebo-button? Maybe nothing we do makes any impact.