> the absence of facts

I'd prefer to speak about "evidence in support of/against" rather than "facts", which often conceals a presuming-the-consequent kind of fallacy.

> denial of science

Whether "science" is believed or denied by any particular person has no effect on whether or not extraterrestrial intelligence has or is visiting earth.

Demanding that "science" be believed is un-scientific. I am not drawing an equivalence between science and religion here, but pointing out that your argument is a super hand-wavey appeal to an inviolable "gospel". I'm old enough to remember when a theory like intra-galactic panspermia was regarded like canals-on-Mars.

In my view, ETI theories are lacking any credible evidence and this makes me sad.