I dont often vote for female's 'trivial' food posts (at least not recently) but if I did it would be because I feel that is adds more value in terms of attracting users and growing the platform. It may also (as it was in the past when I did regularly vote for such posts) be done on the basis that they contribute a positive and fun vibe to the platform that is more value-creating for the platform than posting whiny rants about not earning enough money or that you don't like how people choose to vote. Likewise some art posts, news, photography, humor, memes, etc. (whether or not posted by females, which is often unknown).
Females drive social media and food content is a much bigger and more promising market (and part of social media) than long form blogging. These along are good enough reasons to support those posts, in addition to just personally liking that content better.