Writers: Do you ever get stuck on subjects, topics, or projects that really aren't publishable?

I don’t know if there is a name for this.

I suppose many writers do writing and journal-keeping never particularly intend to share their writing with anyone else.

But what about the condition, kind of the opposite of writers’ block, where one writes proficiently and prolifically— but about topics that are more of the interest of the writer than what could be understood enjoyed by someone else?

Maybe its more about one’s personal experiences, or about topics that are not what one would want to share with others—when one’s goal is to write short stories or a novel for profit or at least contribute something of one’s work.

It used to be that I never liked to show anything until it was finished or it was ready to be published or at least copied. But I find myself stuck writing to perfection or some other standard, yet never again looking at again or showing to anyone else, or keeping in personal journals. I really waste a lot of time doing this. Its as if I don’t like writing for anyone else’s standards because it isn’t really what I like personally.

There’s nothing wrong with writing for one’s self I suppose. But I often get bogged down with this mindset and cannot discipline myself to write for publication.