Yes to the basic point, but note that (specifically) if you use BLAS in Fortran, you're typically losing a factor of several in speed, I'm sorry to say. Competitive serial numerical kernels typically still end up needing assembler (e.g. OpenBLAS, FFTW, ELPA).
I'm not sure why Fortran wouldn't be considered a high level language, if that's the implication (and it hasn't been SHOUTED since the 70s).
I'm not sure why Fortran wouldn't be considered a high level language, if that's the implication (and it hasn't been SHOUTED since the 70s).