This… Doesn’t seem right? Dimmable LEDs are switched hundreds of times a second as would the resistors and other components in series with them. Computers turn on and off transistors (mosfets) millions of times per second. Dude flipping a switch a few times isn’t close to that.
Heat is the worst enemy of most electronics. Many LEDs are put in places where heat is not dissipated well which can shorten life span.