and why the so called friend zone seems populated mostly by men could be because
- it's a reflection of a vocal and embittered, as well as entitled part of the male population
- it's a reflection of pop culture, which ties into the above and is taken for granted
- it's a reflection of a disparity between male and female sex drive and "rules" of attraction, males in general may be more horny and likely to lower their standards to satisfy the urge, a case of male gaze, where the vocal part of men assumes it is easy for women to get sex, but without consideration for whether they want the sex, or whom they want it from.