Correct. It's not Honda that is authorizing these dealers to flash the tunes. They are authorized Hondata dealers only.Just because a dealership is who does the ECU flash does not mean that Honda has to honor the warranty if the tune causes issues. Approved dealer or not.
Exactly how I feel about tuning.Enjoy your tune but assume the fact that your are more likely to have issue eventually and you will reduce the durability of your engine, that’s the price to pay!