@ong if I'm understanding your long post correctly, you may have misunderstood something.

It's a minor point, and on these scales, not noticeable, but it's there.

The human concept of time is dilated as well. The flow of time is different, and that means your every biological process is happening in a different time flow. Your perception of how long a second lasts is unchanged, no matter your time dilation. You feel 1 second as 1 second, no matter what.

The fact that what you call and feel and measure as 1 second is not the same as all humans is part of GR. However, on the difference-in-time scales we're talking, it would not be anything you could notice.

It matters to computers synchronizing. If a computer operates and sends signals at X Hz, but those signals are being received at X+delta Hz, then the computers will not be able to keep in sync with each other. There will be data loss of the kind we first had to fix when our GPS satellites were fading out of sync with the ground below them.

It's perfectly solvable, and as you said, kinda irrelevant to physics. What humans call a time is perfectly subjective. We're not solving a universal phenomenon. The conversation isn't so much about how to account for the time dilation, it's about ... how do we incorporate what is intuitive about time to humans into the way we track time on the moon when humans will be living there?