Not all other games have this feature. If I play Catan with my friends, it's fun, but then the game is over. I'm not going to analyse my game and discover new tactics or strategies, like I will with chess.
Important to remember this is not a universal truth for all people.
> If I play Catan with my friends, it’s fun…
Interestingly, you and I seem to be opposites here. I only play chess for fun and never care if I improve, but spent thousands of hours in my college years analyzing and improving at Catan. I wonder if this is simply a matter of whether one prefers deterministic or stochastic games for optimization.
Older games become interesting to watch, mate in 6-8 puzzles become tenable, chess books about specific openings make more sense. Once a player knows how to finish basic endgames and accord himself properly in the middle game, they have the tools to grasp opening theory. From there on, there is a huge body of information about opening theory, playing styles, control and leverage of center, etc etc.
Much of the ink spilled about this game is a bit impenetrable without some acumen. But with enough appreciation to the past and present trends, one can fine tune one's playing style and really make the game your own.