Relativity and truth

It is a pity that men make so little effort when it is necessary to discover the truth.
Very few men put their advantages after the truth.
"First, me".
It is so obvious when we look at the history of the world, of families, of individuals, that we wonder how anyone can dare to contradict it.
But that is how it is. Society is made like that.
There are among us, people who doubt the relativity of time,
and the funniest thing is that those who do not doubt it, doubt what I say myself, after forty years of honest and in-depth reflection on the subject.
A person said today: "There is no relativity of time, it is absurd. Two watches always mark the same time".
This person does not understand the theory, and the others do not understand much more.
It's a bit like creating two solar watches, in the same place, in the same factory.
They constantly mark the same time, when it's noon on one, it's noon on the other, and vice versa.
But let's move one of the watches in space, and transport it to an Eastern country.
We then notice that at the same time for the Parisian watch, the watch transported to the East marks two hours more (the Earth turns from west to east). For the other watch, it's the opposite, the Parisian watch marks noon when it's two o'clock.
It's very easy to understand.
Well, that's how it is in relativity, there are things that are easy to understand (anisochrony that I understood at 26 and in less than thirty seconds) and others that are more complex (like the spatial zoom effect that took me decades to fully understand, and which is the key to the reasoning for the Langevin traveler).
What saddens me now is the all-out human stupidity.
People don't want to know (neither the cranks, nor the hypocrites, nor the physicists, nor the philosophers).
They just want to preserve their interests, their arrogance, and their fantasies.
R.H.