After all, Eratosthenes was able to calculate the circumference of the earth with approximately 0.5% margin of error[0]. Since they didn't have rockets in 250 B.C, it should be clear that there are other empirical methods to test these hypotheses.
To reiterate, cargo culting is always bad. If you don't have a reason for what you believe, then there's a chance your belief is flawed and it would behoove you to research your question and prove to yourself the validity or invalidity of your belief.
[0]: https://oceanservice.noaa.gov/education/tutorial_geodesy/geo...