The thing about Science is that it is not that much about finding the truth, it is about building models to do things (like predicting that harmful organisms will become immune to antibiotics because of natural selection) to help mankind. A big part of Science is to challenge the old models to see if they still hold up in new scenarios.
Newton model of physics breaks down at the subatomic level, so it is essentially not "truth". But the model is still used for a myriad of applications and taught in all high schools, because it is useful to mankind.
Ahh a realist, "use whatever theory best suits the circumstance, the truth doesn't matter"
An absolutist is always concerned with the truth irrespective of all the associated problems.
An absolutist will always prefer a theory that is perceived to be closer to the "truth", whatever that is. Unfortunately we have no way of knowing if we have succeeded in our efforts (confirmation problem), only that our best theories have either not been dis-proven (possibly true) or are known to be incomplete but lacking a better candidate (gravity).
Newtonian mechanics and gravitation is taught at school because it is understandable and a mathematically sound approximation of Einsteinian mechanics and relativity. If learning Newtonian mechanics made comprehension of Einsteinian mechanics more difficult it would have gone the way of epicycles (also a good way of calculating orbits).
I work in health care. I am a lonely absolutist in an industry largely composed of realists.