Why does everything existing in the universe need be modeled?
It doesn't, but you have to understand that that's the purpose and function of science - modelling that which is modelable.
So, that which is unmodelable is outside the purview of science. That's why science directs those questions to the tehology department.
That's not science saying "it doesn't exist", that's science saying "answering that question isn't something we can do with the tools we have."
Imo, if it exists it should be acknowledged by science that things unexplained may have occured supernatually.
But why on Earth would we come to that conclusion when, every time before when we encountered something with no explanation, it was simply that we hadn't come up with an explanation yet?
How on Earth would you determine the difference between something that we haven't been able to model yet, and something that we'll never be able to model?
The reason that science probably won't say that the unexplainable is the supernatural is because it's never been the case that the unexplainable has turned out to be the supernatural. It's always turned out to be something we just weren't able to explain
yet.
Do you understand the question, yet? How are we supposed to know the difference between the unexplainable-under-any-circumstances supernatural stuff and the unexplained-because-we-just-haven't-found-the-right-explanation stuff? Are we just supposed to assume everything we can't explain is something we'll never explain, even though that has yet to ever be the case?
All things must be explained with the assumption that it is impossible for any existing supernatural being to do anything supernatural.
No. What we're saying is that the assumption "we'll never be able to explain this" should never be made. Why would we make that assumption? How would you know if something is explainable until you try to explain it?
It also explains why only the legged serpents/reptiles disappeared and the belly crawlers and short legged ones survived.
Just so you know, dinosaurs aren't reptiles.