It's an interesting analogy. But one difference between dishwashers and LLMs is that you don't need to check the dishes afterward (if you maintain and use it properly).
Classic example is jeans. Modern jeans are ridiculously stretchy compared to "real" cotton denim because they contain tons synthetic fibers. However I run through jeans at an alarming pace - even compared to when I was a kid. They wear quickly, tear easily, and generally don't last.
[1] https://www.pbs.org/newshour/science/laundry-is-a-top-source...