I did 1 search on DuckDuckGo and 1 search on PubMed, and the items posted were in the first pop. The ratio of index finger length to ring finger length is a known metric with respect to gender. I could dig up more data, but will not at this time. I am only addressing your “beyond stupid” statement.
Just because it is not your personal experience, does not make it “beyond stupid”. Data are readily available. Please be aware that there are ample data to the contrary beyond your purview and refuting your judgement.
It’s ok to learn something.
You are using the flimsiest of “evidence” that women with a ring finger same length as index are transpervs.
It’s beyond ridiculous.