I have written about this too, several times, but thought I would briefly revisit it.
The idea of time travel says more about our mind than it does about reality.
In our mind, we can easily visit the past and future. Present, past, and future all co-exist. So it’s an apparently small leap to assume we can do the same in reality.
While in reality, we only have what’s here and now and our ideas about the past and future are all created here and now. For time travel to be possible, the past and future would have to be stored somewhere, and that’s very likely not how it is.
So the idea of time travel says something about how our mind works. It reminds us that we can easily visit some version of the past, present, and future in our mind, that we cannot find the past and future anywhere else, and that we sometimes mistake what’s going on in our mind for reality outside of the mind.
It also reminds us that all we have is what’s here and now. As far as we know, the past and future are not magically stored anywhere outside of our mind.
Of course, the idea of time travel in fiction is something else. It can create fascinating and fun stories, and those too can be used to explore and say something about us here and now.