Honestly? Presentation. That's why I consider it a dumb argument in general. People mention "Homer's car" or equivalent memes from works of fiction as some kind of ridiculous contraptions, but don't bat an eye when a show like Star Trek does the same. The big difference, IMO, is that Homer's car is delivered to you up front, a solution looking for problem(s). Star Trek's tricorder or roundabout or a starship only happen to show a different one-off feature every episode - so the realization that the equipment is deeply multipurpose, and has all those features already present, kind of flies past people who're not into this sort of thing.