I felt the same way, what a weird thing to tweet about. In all my years interviewing I have never seen anyone that wouldn't talk (or look at the eyes) of my female coworker when interviewing or elsewhere. I had female managers, directors and CTOs, and I don't recall an instance where the gender of the person were a problem. Looking at the person's twitter profile, he matches the type of those who think that having worked at FAANG or FAANG-like companies gives them some sort of extra credibility or something. I work and have worked at FAANGs and feel like if I have to write a short Bio for myself, the company I work for wouldn't make it there.