I don’t think Lemmy is too confusing to use but I do think it’s poorly explained. Most people new to a server are only looking at two things:

1. Overall content on the front page and how effective its filtering is.
2. A topic specific community they are interested in.

But when they begin see the content can be vastly different from server to server and the topics they care about can be split into many communities on different servers they aren’t sure how to access what they want and lose interest.

Granted it’s just the viewpoint of one of the prisoners but it’s the one I found most intriguing. To quote the movie: “Nobody knew what it was, nobody cared…there is no conspiracy, nobody is in charge. It’s a headless blunder operating under the illusion of a master plan…somebody might have known sometime before they got fired, voted out, or sold it…this is an accident, a forgotten perpetual public works project. You think anybody asked questions? All they want is a clear conscience and a fat paycheck.”

The Cube.
Most people saw it as an average horror movie where a bunch of people try to get out of a giant torture box. But there was a pivotal scene that stuck with me where one of the prisoners realizes he helped build part of it. The whole thing wasn’t some intentional torture device but just a bunch of people doing their day jobs that were lost in a bureaucracy not ever questioning what their work was creating.
A stark reflection of society and the systems we create and the dangers of not ever looking at the bigger picture.

Of course they proceeded to shit all over this idea in Cube2 where it ended up being just another evil government experiment.

Convenience.
Sadly it is something far fewer people are willing to give up than any of the above.