Can you name any of these male dominated companies that hire men disproportionately to the gender demographics of their applicants/interviewees? The issue isn't the distribution of employees, it's whether there is sexism present or not and the first thing you'd probably want for evidence of sexism is disproportionate hiring of a demographic compared to their applicant/interviewee demographic.

Just because something is more represented by a demographic does not make it sexist. e.g. Nordic countries seem to be generally celebrated as being socially progressive and ridding themselves of sexism, yet female representation in STEM fields is incredibly low.