The point of the parent article was that it is impossible to make everyone work on the same time zone, as they will inevitably make up their own time zones. This is not even a hypothetical example, the article explicitly mentions western China [1] where the standard time zone was so off that everyone uses an unofficial time zone instead.

[1] https://en.wikipedia.org/wiki/Xinjiang_Time

But when everyone doesn’t live in the same spot on earth, it becomes tricky.

Time for living things is primarily based on the course of the sun above their heads.

Hence timezones to adjust between the local needs, and the worldwide synchronization.

UTC is plenty enough to offer a good sync reference for distributed teams. Swatch beats was a good idea too, but failed.