I read in this Quanta article that although many critics say that it is far removed from nature, it has developed many powerful tools. Furthermore some don’t care if it’s a theory of everything and just apply it to real physical problems and get results.
“Once the elementary things we’re probing spaces with are strings instead of particles,” said Beem, the strings “see things differently.” If it’s too hard to get from A to B using quantum field theory, reimagine the problem in string theory, and “there’s a path,” Beem said.
In cosmology, string theory “packages physical models in a way that’s easier to think about,” Silverstein said.
To me, this seems reminiscent of the early days of the atomic theory where the likes Maxwell, Boltzmann and Gibbs developed tools of statistical mechanics that reinterpreted thermodynamics as a statistical outcome of atomic interactions.