And I think it has more to do with male game desigers designing the females they would prefer to look at.
In our mixed gender D&D group I have noticed no difference between male and female players and stated attractiveness of the characters (which is usually not mentioned at all). The only time I recall physical attractiveness being referred to was one my characters (male character, male player) who was extremely vain about their long flowing hair (in contrast to my balding self) and a bugbear (male player, male character) who made a point of always being neatly groomed.
Have a look at fan art, overwhelming done by females. It's not just professional artists. The overwhelming amount of depictions (including commissions done by players) depict them as either cute, gorgeous, sexy or some combo of that.