Algunos críticos consideran que la teoría es demasiado especulativa y se aleja de la evidencia experimental, lo que la acerca más a una filosofía matemática que a una ciencia física
This is a good point. To be fair, other ideas in physics were advanced on purely theoretical and philosophical grounds before they could be experimentally evaluated, such as Einstein's prediction of the existence of gravitational waves. That said, string theory is very speculative. For context, here is the English translation of the above comment: "Some critics consider that the theory is too speculative and distances itself from experimental evidence, bringing it closer to a mathematical philosophy than a physical science."
Algunos críticos consideran que la teoría es demasiado especulativa y se aleja de la evidencia experimental, lo que la acerca más a una filosofía matemática que a una ciencia física
This is a good point. To be fair, other ideas in physics were advanced on purely theoretical and philosophical grounds before they could be experimentally evaluated, such as Einstein's prediction of the existence of gravitational waves. That said, string theory is very speculative.
For context, here is the English translation of the above comment: "Some critics consider that the theory is too speculative and distances itself from experimental evidence, bringing it closer to a mathematical philosophy than a physical science."