The angry pax were complaining loudly until daughter said that actually she'd rather go up late in a plane that the crew thought was safe rather than on time playing the percentages ...
Kudos to your daughter...
I had a seatmate make similar gripes during a maintenance delay several years ago. After enduring what seemed like hours (which was in reality only about 20 minute's worth) of their venting about the situation, I finally spoke up and asked them: "Would you rather be down here wishing you were up there, or up there wishing you were down here?" I didn't hear another peep out of them for the rest of the flight.
Some people just need to be hit smack dab in the forehead with a clue-by-4 before they "get it.."
Cheers...