As a technical writer, I may have published more books than most professional authors, they just don't get read most of the time and they're not really fiction. (Arguably, I also write more fiction than most authors, but that's another issue.)

I worked for a long time writing user's guides for a PC maker, I'm paraphrasing my wife when I say I wrote the books no one reads. They certainly weren't written for entertainment.

That said, I don't write to be read, I write for a paycheck, but I'm not emotionally invested in what I write.