Making photos is helpful of course to master the craft. To get comfortable with the camera. Learn what a camera can do and how to use the camera successfully. Doing exercises for example if you try to find out things that the camera can do that the eye cannot do. So that you have a tool that will do what you need to be done. But then once you have mastered the craft the most important thing is to determine why you want to shoot pictures and what you want to shoot pictures of. That's where the thematic issue comes to life.
Leonard NimoyI've been doing photography in one form or another for, oh golly, over seventy years. I don't carry cameras. I used to. For many years I carried cameras wherever I went. Photograph whatever I saw that was of interest. In the last years, I've only used cameras to explore thematic ideas which presented themselves first. And then bring out the cameras to try to explore that idea.
Leonard Nimoy