Are there any studies that concludes empathetic people become psychologists (honest question as I do not know)? Or is it an assumption that we make because of the nature of the profession?

Also, is empathy a function of only gender - would not the surrounding environment, role model, religion, books read, experiences in life and various other countless factors affect if a person develops empathy?

> Are there any studies that concludes empathetic people become psychologists

I don't know, but it would follow from common sense that people who are better at X will be more likely to pursue a career where being good at X is beneficial.

> Also, is empathy a function of only gender

Definitely not. Empathy can most certainly be developed.