I’ve never read a study that showed this. Where are you getting your data from? What part of the brain determines philosophy and world view that cannabis effects particularly that other drugs do not?
I’m not sure it has been specifically studied, but may have been.
I do believe peripherally it has in studies on responses to drugs elicited different types of experiences considered spiritual. The drugs electing “spiritual” experiences being the hallucinogens.
Similarly, studies indicating and advocating use of hallucinogens for psychotherapeutic reasons. Studies advocating use of LSD, MDMA, psilocybin or other hallucinogens to change behaviors, habits, psychopathologies have been constant for 50 years or so now.
The more “earthbound” highs from amphetamines, opiods, alcohol, depressants, etc... Have not been found to be life changing.