That saves an enormous load of weasel words, while also helping people understand what science actually is.
Edit:
Your comment rubbed me the wrong way, and I think I know why. It presumes people are too dumb to learn how to read things, but they’re not. Fantasy novels don’t preface every sentence like “in this fictional universe, Frodo handed the ring to Samwise. And then, for pretend, let’s say they ate some breakfast.” Readers would loathe that. Yes, we know this is all made-up. It’s a fictional work. It’s implicit in the name.
Well, science works are no different. “Science” implies “current understanding”. That’s fundamental to it. If we discover a better theory of something tomorrow, we’ll adopt future textbooks to describe that as our new model of that thing. You don’t need to weasel every sentence with “today, we think that…” because it’s implicit in the fact that it’s science writing, just like “it didn’t really happen” is implicit in fiction, and “as far as we know…” is implicit in a newspaper. Rather than “fix” those genres, we should educate people on how to read them.