Obviously, I'm generalising/stereotyping in what I call 'women's books' but I've read a couple of thrillers recently with female protagonists - I think also first person females too - written by men under pseudonyms:
The Girl Before - JP Delaney
The Woman in the Window - AJ Finn
I read a review of the Woman in the Window and it said the author used the pseudonym because it was felt fewer women would otherwise buy the book.
I find it doesn't really bother me at all - if the book is good, if it grabs me when I read the first few paragraphs, I pretty much put it out of my mind.
I don't know how I would feel if it was really obvious that it was written by a man though - whether it would put me off the purchase or stop me even picking up the book. If it had been,
The Girl Before by Terry Williams for example...
Does it affect your decision making before purchase?