What's the role of the detailed descriptions of the other planes of existence? Why it was important for the Buddha to tell them?

There are many repetitions of categorization of the different worlds in the Pali Canon that make me a bit confused. I'm not trying to rationalize them as metaphorical or as a "later addition to the scriptures". I am also not searching for a confirmation. The universe is probably endless and we percept only a tiny fraction of waves coming to our ape senses. There could be myriads of other planes and beings that are present but undetectable with any human-made tools and observable only by an enlightened mind. But why did he even bother to start on this topic? He wisely answered with Noble Silence to other existential questions that could bring additional disputes and disagreements (like the Buddhist cosmology does today in "Buddhism vs. Scientific Worldview" debate despite scientists allow themselves to make up concepts like "Boltzmann brain" or "multiverse" without any issues). And then there is this strict distinction between these worlds although they are not even "real realms" but a flow of dependently originated events. Like we're saying "human world" and "animal world" but in the modern eyes they are not even separate. So what am I missing? Why the Buddha couldn't reduce it to "bad karma leads to hellish worlds, good karma leads to heavenly worlds" but went for this detailed naming and descriptions of beings, deities living there?