It would, of course, be absurd for us to try to coordinate something like "we wake at dawn". We do need to agree a definition of 13:00, such that people can know what 13:00 is.
Maybe it's more convenient for morning commuting in Anchorage in winter in the people acted-as-if clock time was 08:00 at a time when the sun was up (like 10:07 on winter soltice time??). But this also has a complexity cost. Especially if all the communities of the world decide on their own incompatible and bespoke implementation.
There are some personal freedoms that make sense to hold on too, like time at which we choose to wake, socialize, sleep, etc. I'm willing to forego a little personal convivence (of my commute time having perfect visibility) to better enable a single global conception of the definition of universal (Earth) time.
Not least because of behavioral drift. If "setting the clocks back" helps commuters this year, but people lapse in their behavior and sleep in, do we need to shift the clock further next year? By how much?
And so a single anchor is needed. What better anchor than noon being defined as hour of peak height of the sun (rounded to the hour, so with 24 wedge centroids on the planet)? Greenwich Observatory in London is the historically recognized longitudinal definition of the 0 hr offset, and all other wedge segments naturally follow.
A country or community might see their solar position and pick that or an adjacent one as a compromise. That's a political decision, and can make sense.
Choosing additional stipulations and offsets is necessarily choosing more complexity, and more distance from a simple universal time anchor, and I think voters should hold this perception in mind when judging policies or politicians implementing them.
[0] - https://en.wikipedia.org/wiki/Focal_point_(game_theory)