Looked at authors other project, https://github.com/heyputer/puter, and I am perhaps missing their motivation, but I stand by the result.
This is the kind of thing I might have written in my youth: "Hey, all these disparate computers and systems, and my generation has this amazing new platform: javascript web views. Maybe I can solve this problem by making a new platform, that runs everywhere!"
Doing this for its own sake is Hacking. It's a fun project and would require a lot of learning through experience.
However, it suffers from the xkxd://Standards problem in the first case, and in the second misses the fact that I prefer macOS while some of my colleagues prefer windows. It is also fundamentally naive. Perhaps arrogance was too strong a word. It might be a lack of experience or might be dunning-kruger, but these tools are far more complex than it appears the author grasps. One comment from HN on the puter project was that it doesn't have any kind of security - it seemed to be as trusting as a 1998 Windows computer.
My main complaint still stands: this was written by someone with little thought about what the user wants. It is clear what the author wants, given previous projects: One giant system that Does Everything. Only the author wants this. Users want specific tools that have been refined and improved by an invested development team with expert domain knowledge.