Many researchers in less mathematically rigorous fields lack basic statistical knowledge, such as how a p-value is calculated or what a chi-squared test is. And that isn't to be snarky towards them - they have a lot to absorb in their own field. It just means that they are slower to adopt or even know about various mathematical techniques.
This reminds me of the med researcher who rediscovered integration in 1993 and was cited many, many times: