Precisely because I’m a philosopher of science. Science is by far the best way we have devised, in any culture, to figure how the world works. Anything at odds with it is therefore very likely to be incorrect. In the specific case of indigenous knowledge, I know this with a good degree of confidence and have written technical papers about it. See, for instance: https://www.scribd.com/document/644625323/2021-Is-Indigenous-science-pseudoscience-I-Indigenizing-the-University-pdf