Correct me if I'm wrong, but doesn't the 2011-2017 Odyssey have a green indicator light show up on the dashboard to indicate when your headlights are on? My 2014 Odyssey Touring does and I'm pretty sure my old 2014 EX-L did too. Not sure about other year models. Just sometimes easier to see that quickly on the dash. But yes, don't go too hard on your mechanic please. I always go back and check all my settings once I get it back from the mechanic to make sure it's how I want it to be.I don't remember what made me look at the turn signal stalk but that's when I realized that the shop had left the lights on 'OFF', and all the way through that maelstrom I had not been showing a single light except for brake lights.
We both always leave our lights on 'AUTO' and we get so used to it that we just don't think to check after the shop has the car.