Many times I begin writing and ask myself: why should anyone care about this? Lots of times, I have an idea that I hardly care for myself. Still, I don't discard it. I make a note of it and move on. Who knows where I could find a purpose for that idea?
After several years of blogging, I found I needed to take more profound steps in my writing. In particular, I felt a burning need to write about things that seem to be often avoided. People do care when you bring something up that they don't expect. Sometimes, such unexpectedness is met with fear and negativity. But, potential negative reactions must not deter a writer from deciding what to write.
It doesn’t matter what type of writing you do, because someone out there will care about it.
There’s nothing wrong with writing reviews, or reflective journals, or informational articles.
There's nothing wrong with writing light humor or a little piece of flash fiction.
There's nothing wrong with writing an adventure novel that exists purely to thrill a reader.
As long as each of those writings fulfill their specific purpose, and not just some broad sense of having written something, someone will care about it.
But, there’s a bit of a paradox here, since it is important for a writer to write even when he or she isn’t finding a purpose for the words being written. Still, when publishing something, make sure people will have a reason to care about what you've written. Don't just publish something because it sounds good. I've been guilty of that myself.
Publish something that actually will add something to the lives of those reading it. Share your passion to others through your words. Without adding value to your readers’ lives and sharing your passion, you're just spinning your wheels.