That analogy seems to imply that people who waffle new-agey platitudes are somehow experts. I can't say they're wrong, but I wouldn't defer to their judgement anyway. When people talk about "higher realities" and "deeper truths" and the like, they're forcing the assumption that these unmeasurable subjective experiences are more fundamental to the universe than the laws of physics, and anyone is within their rights to call bullshit on that.
People who waffle new-agey platitudes may or may not understand much of anything, and I wouldn't defer to their judgment in any case.
But if you want to know what you're talking about when calling bullshit, you need an adequate understanding of the ostensibly "unmeasurable subjective experiences" in question. How unmeasurable and subjective are they really? Are they in agreement with the remarkably successful model commonly thought of as "laws of physics", or do they contradict it, or do they fall outside of that scope? You're guessing that your knowledge is adequate to make a reasonably informed judgment that the new-agey claims are all bullshit. My assertion, based on my experience with a subject I've devoted much of my life to studying, is that your knowledge is not adequate.
You're right that the new-agey claims are mostly bullshit. But there's stuff that's true and that can be understood to matter mixed in with the bullshit. If you don't want to hassle with trying to separate the two, and just want to ignore all of it, that's a reasonable stance in my view. Not everyone has time for this stuff. But then if you make strong assertions about other people's beliefs and experiences, very often you'll just be wrong.
Many scientific subjects require a lot of effort to understand to more than a superficial degree also. The physics of physics journalism, for instance, or even undergraduate physics, is typically a sketchy caricature of real physics. Most of what seems "counter-intuitive" to people about 20th century physics seems that way because its described in a way that's actually wrong. Understanding dreaming doesn't require the same type of kind of logical rigor as physics, and the abstractions are different, but takes a lot of work to sort out what's real from what's not.
When I first had astral projection experiences in the mid 90's, I messed around with it, figured out what I was doing with my senses, and dismissed it as meaningless. It took me ten years to discover that there was more going on than the more superficial aspects of the experience, even though I was mostly right about the part that I thought I understood. And if I'd put less effort into it, or my luck had been a bit different, I never would have figured that out. I'm not claiming intellectual superiority, I'm just sharing what I can see from where I am now, that if you put a fair degree of effort into understanding dreaming, you find that there's a lot there that's not what it seemed at the outset. I'm not even expecting you to take my word for it: I don't think that putting that kind of faith in other people's claims is a good idea. But I think if you relax your judgment a little bit, leaving the door open a little wider to the possibility that people like myself are not just blowing smoke, then you'll be 'forcing assumptions' a bit less yourself.