I think i've solved it. The answer is that physical properties don't really exist. They're all derived from mental properties/ are abstractions emergent from them (which is not necessarily different from mental properties being emergent from other ones). When we look at it this way, the real question is why does the mind exist... why does it "be" per se.
But that question is identical to, in a physicalist standpoint, why does the universe exist. How did it come from nothing? How did it begin? The point being that we don't know and more so, we cannot know anything past the cosmological horizon of the mind where information and causality become conceptually extinguished/intangible.
Some other issues is that qualia is not so simple as qualia. To know we even have qualia relies on the structure of the mind as relates to the easy problem. E.g. we cannot even know we have qualia without things like metacognition.
Descriptions from which we derive explanations are about mappings between concepts and between modalities. Qualia as a fundamental particle of the mind cannot be mapped or described outside of experience/to itself but this doesn't make it an ontological problem. Ontology itself is illusory and epistemologically vapid. But we have to live and act like it isn't.
When we look at things this way, the mind is also not the same as the brain. The relationship is more complex.