It’s good Apple posts this info online, but hunting for troubleshooting tips when something goes wrong is a poor consumer experience. Especially as the requisite button press combinations/sequences, timings, and LED color flashes are not something a user can realistically memorize for all the products they own.
The traditional reset method, namely a small button you poke with a pin/pen/fingernail/etc, would be simpler.
Or even simpler, just have them always reset whenever you put them in their case or start charging them?