I dig what you're saying, I was the same way. Thing is there is only so much you can do with shyt like EEG and other machines and that's not taking into acount personal and professional biases.
There is some shyt you are just going to have to experience and prove to yourself.
I can fathom the bolded, and I try not to fall into scientism territory by pretending that only science can spell out reality, but when I read claims that sounds like super powers, it becomes hard for me to not get into that modd since it's stuff that seems like it would be very easy to demonstrate regardless of the available technology.
If people dream of what they describe as other realms or entities, aight, whatever they say. I have no opinion.
But if they say they can dream and interact with other people, then... How hard could it be to isolate two practitioners, tell one of them a code, and verify on camera they can communicate it to somebody else? Personal biases can't get around that.
And as for trying it for myself, it makes sense, but for me the thing is this: I don't trust my individual perceptions when it comes to certain things, this being one of them. Folks experiencing or believing things don't necessarily mean they exist outside of their imagination.
For example, I used to think I was able to do the lucid dream thing until I realized that I was most likely just dreaming I knew I was in a dream, which explained why even when I "realized" I was in a dream I never was in real control of myself as I would be awake.