These studies are all deeply flawed. They find willing participants, give them some drugs, then ask how they feel about it. Of course they say they feel spiritual and connected with the world and all of that, that's what the drugs do. But I know plenty of people who claim that mushrooms or lsd were spiritually awakening and connected them with the world, who wouldn't think twice about stealing from an old woman's purse, robbing people, or worse. I know alcoholics who claim they don't have a problem and think drinking is just good fun, but are also violent assholes when they drink.