As a counter example I have a good male friend, who, even being born in the US, still has a name most often mistaken as female. He does not have any such note

As a counter example I have a good male friend, who, even being born in the US, still has a name most often mistaken as female. He does not have any such note in his email, works in a well respected field with a much more even gender ratio and hasn't written about it, because as far as he is concerned it is a non-issue that only leads to harmless, sometimes funny mistakes. Perhaps your example is just not perfect, but without a good non-gendered pronoun, this is hardly an easy problem to solve. And let's be serious, "he/she" sounds and reads awful, and "they" is dehumanizing. In many languages, ungendered items will takeon the male form, which seems to serve them well.