And I'm a fool.
Storytelling and reality aren't mutually exclusive. Consider great minds like Clifford Stoll, Alan Kay, Raymond Smullyan, Douglas Hofstadter -- we can't be sure that what they say is True, but their stories are compelling, and their wisdom seems sound enough. Humans are analogy-engines. For us, myths are the best way to transfer information. And even if the information isn't Truth, it's probably good enough. And "good enough" will likely improve the lives of your children and grandchildren.
Of course you can't know everything! There's endless territory to explore. But there's no harm in exploring the incredibly small world around you. And there's even less harm in finding ways to reduce suffering for others, if you're into that.
I guess what I'm trying to say is that I agree with you in theory. But in practice, worrying about whether things are technically True obstructs the way of finding things that seem to work. And many of us deeply enjoy discovering things that "seem to work", and then telling great stories about them.
Exploring reality can be a lot of fun, if you don't take reality so seriously.