Seems like many people start and end this way. Games are a great motivation to learn how to code. But once you do, you find that other subfields of CS are more interesting and useful. And you just get older. :)
But that is not reason to quit game development entirely. It is still a good hobby that makes you a much better programmer, because it touches so many areas of CS and math. 3d graphics, state machines, trees/graphs, pathfinding, multithreading, memory management, vector math, networking etc.
But that is not reason to quit game development entirely. It is still a good hobby that makes you a much better programmer, because it touches so many areas of CS and math. 3d graphics, state machines, trees/graphs, pathfinding, multithreading, memory management, vector math, networking etc.