Notion of simultaneity

The great rabbis affirm that our world is a world of lies. This is obviously very true if we look at the political world (they are there for power), it is obviously very true for the commercial world (they are there to make money), and enormous scandals have shown that this is also true for the medical and pharmaceutical worlds.
The same is true in philosophy and science, where there are either obvious errors, which are denied, or obscurities, or worse, extravagances.
This world is a world of lies.
I sincerely believe that people, in their deepest nature, more or less consciously love lies, especially if the lie reassures them, or if the lie allows them to dominate others.
One of the greatest lies in the history of humanity is the glorification of a moron who copied the works of a true genius, who himself never lied. I'm talking about the genius of Henri Poincaré. Unfortunately, it seems that his ideas have been deflected, rather than taken further.
One of the fundamental ideas was the notion of the relativity of simultaneity. Did two events that occurred simultaneously for an observer (for example, the explosion of two supernovae for an observer on Earth) occur simultaneously for an observer, even if stationary relative to the first, but located "elsewhere"? Logic seems to affirm that yes; this seems incontestable to us. Yet Poincaré rightly doubted it. He spoke of "different theaters."
It is a strange phenomenon due to the nature of time.
It then becomes clear and definitive that one will never be able to match two watches, let alone several, with each other. It is a powerful idea, but abstract. This can never be the case in nature. So how do we synchronise stationary clocks (if they aren't stationary, that's a foregone conclusion, but let's say we want to synchronize all the clocks in a vast geostationary field?)?
The only possibility is to achieve abstract synchronization on an imaginary clock, ideally placed in a virtual fourth spatial dimension, and equidistant from all the clocks in our geostationary environment.
This is, moreover, without realizing it, the system we use when we speak of "universal time."
This is how we can achieve a kind of coherent synchronization on something, and how we can classify events.
Simply, in nature, this simultaneity doesn't exist. The notion of absolute simultaneity is absurd.
Romeo on this bench, Juliet on that other bench, do not exist "simultaneously" with each other in an absolute way. Their "plane of present time is not confounded."
Many still believe this, because that they do not understand the theory they teach. They do not understand that the notion of universal present time so imbued in our rational minds is only a scientific golden calf. A nothing. A pure physical nothingness.
R.H.