alt Hacker NewsKnowing when I land, especially if there are any disturbances, is probably THE most important piece of information with regards to a flight. I have already planned my airport arrival, at least for the first leg, and the worst scenario is I have to stare at a screen/book for a bit longer. If the landing is delayed I might need to make amendments to the plans for the rest of the day.
The complaint is about the visibility of the flight duration (e.g. "this flight will take 1h 50m"), not the landing time (e.g. "this flight will land at 11:25am"). The landing time is prominently displayed in the flight info pane. Knowing your flight duration (gate-to-gate time) is not impacted whatsoever by flight delays, so I think you're conflating these two things inappropriately.