It actually helps your creativity and receptiveness to new ideas when you decide to maintain a distance between yourself and your previous works.
You don’t want to write about the same thing if you’re seeking variety. You can still expand on a subject matter, from a different perspective, to keep things fresh.
When there’s been gap between your writing and reading your previous work, it fills you with wonderment. I did that didn’t I? That was a good one! You actually feel entertained by your own work.
Also, the summit of writing ability isn’t the ability to write a novel. Writing a novel is just another form of creativity and expression. You can just as well express in a play, a poem, a short story or an essay. It doesn’t render you a lesser writer compared to a novelist.