You say that, but I was, many years ago, left behind by the Caledonian Sleeper (which had been “retimed to depart earlier” apparently, … the first I heard about that, despite having a booking, so they had my contact details, and knew the times for which I had booked) on Watford Junction station: I saw it pulling away as my local service to the station was pulling in — that's about as committed as one can be!
I took the local service back home, booked an EasyJet to Glasgow for the following morning, slept for a few hours, got up, drove to Luton Airport, … and made the meeting I was attending (in Dunblane) approximately on time (maybe half an hour late, can't remember). The total cost, including parking, was lower. I got more sleep.
So being committed to something is relative, I guess. And loyalty can be fickle. And is easy to destroy.