For possibly the majority of the planet, relationships between things do not jump out like an interconnected web and therefore that’s not their “fundamental truth of how the world is made up”. If that’s surprising to anyone else who reads this: welcome to the club.
Things themselves do not exist outside of conceptual thinking. Unless we can get down to the true atomic source of everything, then maybe you've found the distinct "thing", but you cannot experience that, only describe it.
For example, my "body" is made up of the ultimate fundamental atomic unit just like everything around it. There is no line of delineation, it's just a sea of atomic units. My body only exists as a distinct "thing" because that's how we interpret this sea of units with our limited senses.
I see it a little like pixels on a display. The array of pixels all display light, they are all the same, but as we zoom out we begin to interpret the many pixels forming distinct objects on the screen. This does not change the fundamental reality that the pixels are not that thing, and that thing does not exist outside of our interpretation.
And all of this is assuming reality is fundamentally atomic, which has yet to be proven.
In fact, it’s my opinion that it’s possible there is no Absolute Truth at all (if there’s any I suspect it might be math, but that’s way above my pay grade as it were) and that everything is simultaneously one, nebulous, and subjective.
However, for convenience we need to have these discussions about interconnectedness somewhere closer to the “We are humans interacting with a solid world” paradigm.