Some kind of time dilation is observed. Einstein's time dilation has not been "proven"."Science only deals with observable/verifiable facts. Illusion of time dilation that can not be recorded is nonsense, NO OBSERVABLE/VERIFIABLE FACTS."
You are quite confused between Theoretical Physics and Physics.
But much of Theoretical Physics is understood as being correct.
The effects have been proven,(insert comment here).
How do you distinguish Einstein's time dilation from different rates of electron spins dictated by the Classical Theory of Nonlinear Universal Relativity? Answer: You can not distinguish between the two.
As said above:
The relativistic model itself dictates that it will produce mostly failing predictions of time dilation. In the case of perfect symmetry the model fails totally, it can not produce a mathematical prediction of time dilation that would correspond with observable facts of reality.