>We still use Newtonian physics plenty, despite bits of it not working due to relativity.

Absolutely. And since no one else has trotted this bit out yet, I guess it will be me:

All of our science is based on imperfect models of how the universe works. Every single one is wrong.

However, the models we use today are less wrong than those we used in the past. We know this because we (as you pointed out about Newtonian physics) can more accurately describe the universe than we were able to do previously.

That doesn't mean we've found "the truth." Nor does it mean that we have all the answers.

This is an important concept for baloney detection as those who are peddling baloney will (often, but not always) purport to know "the truth."

Anyone who makes such claims is either knowingly attempting to mislead or is lying to themselves and others.

Which, IMHO, is a pretty big red flag in baloney detection.