Lots of people do and frequently. Nothing we can do with this analysis can ever tell us what precisely gives rise to these religious experiences, but systematic analyses of experiences might narrow the speculative possibilities. He meant this in spiritual or mystical terms. These revelations are religious only insofar as we see them as such. As far as examining these things scientifically indeed we can.
Religious experience is important.
It can be examined scientifically. It is more likely to occur is some situations than in others. We know something about how that works. Understanding the experience, harnessing the experience, optimizing the experience, are important to us.