hair grows on bodies and that is okay, for women and men alike. leg hair does not make anyone more or less feminine. it's okay if someone doesn't want to shave and it's okay if they do. it's nothing to judge someone for!
The chaos system at work -- it seems very likely that the razor manufacturer's push meant ladies with legs and underarms they felt were attractive enough that they should be flaunted -- kicking off the flapper dress craze and all that went with it.