As the author of over fifty works of fiction, people have asked me why I don't concentrate my work and pursue a single genre. They point out that genre writers, especially those who specialize in serial genres, reap the greatest commercial rewards. They have a point and the evidence is clear.
The contempt these mystery readers sometimes feel directed at them gets recycled as they express disdain for books they don't like which have been written and enjoyed by people they have to denigrate. That's not an argument or even a defense: it's blatant insecurity.
Calling critics sexist for disliking a book doesn't fix the problem of gender inequity in literature.
We live in a world where success is considered to be directly correlated to the amount of commas in a person's bank account, and to some degree, success and monetary returns are tangentially related.
At the end of the day, writers can't worry about what readers think, want or buy. We have one job, and one job only: to follow our passions and put words on the page, creating books that we, ourselves, feel proud to have written.