> Or that everyone in a region agrees on what time it is.

And how does the existence of the tzdb solve this problem in any way?

> Or that ccTLDs are sufficient to unambiguously cover the entire earths surface.

The user can still pick whatever they want. Just as they can now. The user can resolve ambiguity for themselves. Unless the tzdb decides unilaterally that their politically organized name for their timezone is somehow "wrong" and must be moved to the "backwards" file to be removed entirely. In which case they must accept whatever ambiguity the tzdb has created for them. "US/Pacific" is unambiguous. "America/Los_Angeles" is not.

> Your solution is insufficiently complex to solve a problem of this complexity.

You need to solve one problem. Publishing official tz information. If you have extended needs, then by all means, it's a computer, do whatever you like, but for the overwhelming majority of the population of earth, they need one function.

"What time does my government think it is because that time controls when things open, when I'm late for work, and when official paperwork has to be filed."

If you want a "whimsical" database that correctly gets timezones right for certain Japanese islands during the war, then you have that, but honestly, what general use case is there for this?