Where science becomes useful is in applied sciences. Applying science is ruthless: it either works or not at all. When it works, it's typically very valuable to people. Most of our recent history is a boom in applied sciences that started accelerating about 600 years ago when Galileo started publishing some notions about the earth revolving around the sun while also providing and documenting the tools that he used to come to that conclusion. Galileo was censored by the church but the cat was out of the bag as loads of contemporaries verified his results and started building on his theories.
Most of the progress in applied sciences is directly connected to progress in theoretical science. And a lot of that is of course enabled through experimentation. Which is a form of progressive insight that accumulates knowledge. But only if we publish it and build on it. And of course a lot of mistakes get published as well and there are always loose ends, alternative theories, wrong theories, etc. So, there are no absolute truths. Science is never finished, complete, or even internally consistent. Newton was on to something and then Einstein challenged some of that and after him quantum theory challenged some of his notions. Progressive insight. None of it is necessarily wrong and lots of things happened in between. Good science starts with challenging everything and then trying hard to falsify any theories that emerge from that. You look for negative evidence, not for positive evidence.
Bad science simply doesn't work when applied to reality. Flat earthers earning a Darwin (whose ideas they'd typically also reject) award by dying in apparent attempts to be scientific about their delusions is a thing. There are all sorts of crazy individuals who launched themselves using some death trap to "prove" that the earth was flat. It's not very valuable science of course because we already knew the earth wasn't flat. And there are no known flat earth theory applications that have any economical value.
There's a whole branch of pseudo science around intelligent design, flat earth, etc. that basically tries to "fix" the inconsistencies between religion and mainstream scientific knowledge by using scientific methodology. Which is of course mildly ironic and tragic at the same time.
However, applied pseudo science usually ends in tears: because it just won't work. Applied pseudo science is of course a thing. Homeopathy, and other snake oil medicine is ever popular. It doesn't work, of course. Or at least not in a way that can be verified in a way that holds up scientifically. But that doesn't seem to stop people from believing in it anyway.