> Furthermore the association of dissonance and consonance to the simplicity of the ratios is not consistent since the idea of dissonance is a social category, not a scientific one.
Again, Plomp & Levelt (1965!). It's not about "simple ratios".
No, but it is partly about beats and matching partials. See https://sethares.engr.wisc.edu/ttss.html which describes how the spectra of timbres affects which harmonies blend. You can synthesize inharmonic timbres to get arbitrary scales and tunings to blend more.
You can try this on a guitar. If you pluck a string right in the middle to kill all the even harmonics, major 7ths and minor 9ths don't sound so dissonant as they did when the original string had its 2nd harmonic octave present.
Again, Plomp & Levelt (1965!). It's not about "simple ratios".