The problem with those results is that they did not exactly match what was observed. These discrepancies were proof that Newton and the others had missed something.

Einstein, Lorentz, and others laid the foundation for a new theory. Lorentz contraction and time dilation seemed to be basic properties of this new physics. The equations describing these effects were also straight forward. Given the same variables everyone got the same results and those results matched what was observed in the experiments.

Then Einstein conjures up General Relativity and everything goes off the rails. Newtonian physics could make very accurate predictions which could be computerized. Because the Newtonian predictions were both precise and free of human bias everyone basically got the same results which did not completely match what was observed.

General Relativity cannot be run on a computer. It is not an equation. If four people try to produce an answer (without knowing the correct answer beforehand) using GR they will get 4 different answers. GR is more of a recipe than an equation. The difficulty factor and the fact that many of the variables are produced by the person doing the calculation makes GR an intellectual maze.

Newton’s equations will produce precise answers. That precise answer can be compared to what is observed. With General Relativity precise answers are not available even with a computer (except for things like black holes where most of the variables become singularities or zeroes).

If there are local phenomena that violate GR how would we know? General Relativity doesn’t recognize the possibility of the Galactic Velocity Curves. But we are told that GR holds up locally.

If GR is incapable of making a precise and repeatable prediction for everyone that uses it, what good is it? The “fuzziness” of GR makes it worse than useless since unique phenomena can be buried by reporting that they are explained by GR.

Newton’s theories failed because they produced precise predictions that could be checked. General Relativity is not precise (as formulated) so that it never fails. Produce a GR computer program that gives everyone the same prediction for the same variables, or acknowledge that GR is (at a minimum) incomplete.