That is a good point. But human experiments are still allowed, just severely curtailed. Seems like other fields are able to advance with observational studies

That is a good point. But human experiments are still allowed, just severely curtailed. Seems like other fields are able to advance with observational studies, why is Psychology singled out as being impossible. If studies can't be re-produced, then analyze why and try again until it can be. All the doomsayer arguments in this thread is weird. Who would ever say "man this double slit thing is tough to understand, maybe we shouldn't do physics anymore".