Who?

If I put two watches of the same internal manufacture, that is to say two watches of the same chronotropy (chronotropy is the internal way of a watch to measure time), and I notice that one marks 3 o'clock, and the other three and a quarter, I conclude that they are not synchronized.
Synchronizing two watches means for Dr. Hachel (I don't know about others), that at a certain moment they mark the same time.
For example, I synchronize the watches at the start of the Langevin, and the two watches mark t=0.
At the end of the experiment, the two watches are desynchronized, they no longer mark the same time at the same instant for the observer.
Synchronizing means, matching the instants at a given moment, on watches of identical chronotropy at the start.
Saying "and making them beat at the same rhythm" is ridiculous. This is necessarily included in the reasoning.
It would not occur to anyone to experiment with a lousy watch that beats faster or slower than another.
Now, further (this is Hachel speaking, let's give way to the master of RR).
What happens if I set two identical watches (same chronotropy) on my table and I slowly move one of them towards the moon
(let's say in three weeks to avoid a v²/c² ratio very different from 1)?
I notice in my telescope that when my watch marks
00:00'08" the lunar clock is desynchronized and marks 00:00'07".
Is this true or not?

No, it's not true
Python

If it's Python who protests, of course it's true.
The fundamental question, absolutely fundamental, absolutely dramatic, absolutely scientific and above all absolutely relativistic, is: WHY are watches out of sync?
There, two very clear opinions will oppose each other, that of the idiot Python, and that of the true genius of humanity Hachel.
This will inevitably create the most magnificent sparks in the entire history of relativity, and forty years of hatred, misunderstandings, bullshit, whining..
I'll ask my question again, of such depth that we must warn potential contenders for armed conflict with Hachel not to answer stupid things.
WHY are watches out of sync?
Because I love them, me, my two watches, and it hurts my heart to see them in this sad state.
Who can answer the best RR theorist in history (me) without answering beside the point, but totally beside the point?
Who has this formidable level (a moment of hope).
R.H.