It seems to me there’s no shortage of advice to imbue your work with meaning, and to understand what your work is about. Some say because if you don’t know what it’s about, joe will other people know?
The better advice, I think, comes from those who say you don’t have to know what your work means, and I say, further, you may never know fully what it means.
That’s mostly because we’re only half the equation of art. The audience or public in general are the other half, and everyone brings their own experience and insight to what you make. Art is open to interpretation by its nature. Even if you purposefully craft a particular meaning, there will be different ways to understand it.
It’s fine, even good, to have a subtext. As long as we aren’t to attached to it or dogmatic about it when we send it into the world. Part of the wonder of art is in that relationship with the ones who take in the things we make.