A standard pitch is important, so musicians from all over the world can actually play together. This is why an international standard was a good decisions. Before this standard you could not play the instruments from different countries together in the same band.
Now we are living in different times and there is no good or bad and right or wrong pitch.
The point is, that there are natural frequencies we can tune in to and this is my speciality.
My entire work is based on this for over 20 years now.