This is exactly the problem I tackled in that article about Sisyphus – a different kind of science, i.e. description of the world, won't change reality. Science didn't come up with entropy in order to believe in something or impose some arbitrary constraints. The question, or rather one of many questions, was, “Why are humans mortal and all things dissolve in the end?” The first answer in ancient history was most probably, “I don't know, who cares.” Then it became God and his powers, which further evolved into what we nowadays call “entropy” and “the second law of thermodynamics.” But those are just attempts at explaining what is, not the other way around.

In other words, it's not the lack of, or adherence to a particular kind of, belief or interpretation why we cannot walk through the walls. The question rather is, “Why, under ordinary circumstances, that is the obvious case?”

When it comes to QM, the terms observation and measurement are rather ill-conceived on physicist's part. Perhaps a better term would be “relevancy of interaction.” Consciousness plays no role in that. If it did, the whole Universe would be always in “collapsed” state and double-slit experiment would be impossible to observe. That would be true also in the case if only human awareness was responsible for that loss of coherence – human would always experience the cosmos as “collapsed,” and, again, double-slit experiment would always yield the exact same result (two distinct slits, never interference pattern). I elaborated on that rather extensively here.

What Madden says about tick, umwelt, and uberumwelt is exactly so. However, as I see it, the problem with further extrapolations is threefold:

1) an electromagnetic being would register not only as an “alien perception,” but also as a pattern in our machine detectors;

2) dark matter, if it proves to be (f)actual, is unobservable only because it does not interact with electromagnetic forces, otherwise it perfectly fits into our models (well, it was introduced to make our models work) and the interaction with the 5% we can “see” is purely gravitational (suffice to say, gravitation is so weak that, as of today, we could hardly measure gravitational waves of a merger of two black holes, and only this year also faint hum of gravitational wave background of Universe);

3) if some phenomena are exclusively “made of stuff” that we lack, there is absolutely no way for mutual interaction and hence we are, and will be, totally oblivious to them – no perceptual rendering (even if outside the range of our senses), no intuitive hunches about it, absolutely nothing, nada.

Sure, you may argue that, since we have no clue what other rules apply in the 95% of the Universe, our science is pretty kindergarten level, but that 5% still behaves the way it does. There's simply no way around it. And of course, that also means that none of what I said loses any relevance even in the case that Universe is just a “dream” and matter is immaterial.

But maybe you are right. Perhaps I cannot walk through walls only because I tell myself that it's impossible as I don't want my thoughts to manifest, because, at times, I have very strange ideas and life would be a nightmare, if they instantly became palpable. Well, if I could, perchance, manifest only the desirable ones … but isn't that what the swathes of (self-proclaimed) sorcerers more or less futilely strive for? And all of that naturally leaves open the question that, if our nature is to be able to pass through walls and in essence also be physically immortal (because that would be the case in such a case), why do we procreate? Is that some false narrative, too?

So, the question to me is, what motivates you to work so hard to invalidate the obvious fact that the walls are usually impenetrable? I mean, if it's all just a matter of narrative, I've yet to see a newborn levitate above the cradle.