Which doesn't mean you will get the high levels of those neurotransmitters just bu doing psychedelics, it takes continuous work, there's no way around it.
Also I've noticed that some psychonauts tend to not understand the psychological nature of ego, maybe mecause if you have never had an awakening just using meditation of self inquiry you don't become so aware of the nature of the I thought (ego sense) and how it prevents you to experiencing the non dual conciounsess you have all the time as it really is.