This is the biggest strength of science: this rigidness of thought is what protects it from clever charlatans. But this is also its biggest weakness because this risk-averse behavior, when scientists can't risk saying unapproved things without torpedoing their own reputation, is why science makes only tiny steps. Right now physics has reached a rather big obstacle on its way and the usual risk-averse-one-tiny-step-at-a-time tactics won't work.