Dear Aitor,
You put a very important problem - understanding the foundations of physics, the basis of the scientific world. Your important conclusion:
«Simple explanations are more difficult to find than complex ones, because the latter may be adapted whatever is necessary to get the desired result, but at the expense of intelligibility. The solution is maybe simple; what is complex is to find it.»
Yes, the present crisis in basic science - a "crisis of understanding". Understand means "grab structure" ( G.Gutner Ontology mathematical discourse).
To more reliably steer the Future physicists and poets should be one picture of the Universe filled with the sense of the "LifeWorld" (E.Husserl). Physics fractured world and then "blew up" the Universe. And where did the "fundamental constants" and "laws of nature"?... Need to grasp this "simplicity of the complex ."
Closed science: «Shut up and calculate», Open Science: "understand and count fast".
Understanding the foundation of the Universe device is necessary not only to physicists, but lyricists:
"We do not see the world in detail-
Insignificant all and fractional.
Takes me sadness from all this .
Vvedensky Alexander (1930)
Physical picture of the world should be the same rich sense as world picture lyricists.
Unified picture of the world for physicists and lyricists - then management of the future of humanity more reliable, because there will be understanding.
I wish you good luck!
All the Best,
Vladimir