Ha ha, I'm named John. Almost no one has named their sons John in perhaps 50 years? So, it is less of a surprise that positions with typically old White men are going to skew "John".
Guessing Starbucks is not a job where men named "John" outnumber women.
> "Almost no one has named their sons John in perhaps 50 years?"
"John" is still in the top 30 names as of 2016 (ranked 28th) according to the SSA†. It has fallen, for example, from 14th in 2001 when it peaked at 0.914% (18884 births) of the total male births. It was about half that in 2016, at 0.495% (9952 births).
Guessing Starbucks is not a job where men named "John" outnumber women.
;-)