Look, the way science works is that it observes the evidence, makes a conclusion, and does some observations to test that conclusion. If new evidence shows up, the conclusion can be modified....But some things are so certain they will not be overturned based on any evidence.
Oh, back to religion again, then?
What you are noting is that all worldviews, at base level, must contain some presupposed certainties upon which to build the rest of their coherent view of how things are explained. Whether one calls this "preunderstandings" or "religion" or "foundational assumptions" or "ontological realities" or "fill-in-the-blank," everybody has them.
That, of course, is why scientific constants are not constant. And why Thomas Kuhn wrote his now (in)famous book.
