She’s spot on correct. (I’m a woman, so I’m safe voicing my comment here.)
The ratio of male actors per film is much higher than for women. When it comes to the latter, Hollywood is a buyer’s market. There are so few substantive parts, even for supporting roles, that actresses are grateful to get into anything. Which means that while Leonardo DiCaprio can appear year after year after year, Amy Adams might not. (Especially as she gets older.)
Therefore, whoever pays the salaries calls the shots. Also, while there are some fine actresses around, none really have that kind of star power to command the ideal salary.
Maybe someday this will change, and there will be more films for women, but I have a feeling that men (especially white men) will continue to dominate the field. The smaller nature of TV seems to suit women better; they shine there.
The director for “Butch Cassidy and the Sundance Kid” (i.e., nearly 50 years ago) liked the Etta Place character, because usually in action films the girlfriend is an afterthought or just a drag on the action.