I agree with that. But science is science. The lower the note a instrument has to produce the bigger that instrument has to be.
That's why,...
Even though a violin, cello and double bass look the same they are different sizes. Lower notes require a bigger scale. That's science, not my opinion.
There are many reasons why an elephant and a bird sound different. One of the big reasons is scale
And actually, scale is the simplest solution. But,..you just can't change it 'after the fact'.
That's why Leo Fender didn't just put thicker strings on a Strat when he wanted to make a bass guitar. He knew that the E string should be at least 34". But he didn't account for the B string back then. Ideally, the B string should be 37". But that's too long for my short limbs.
But that is why the 'fanned fret' idea is genius.
peace,
anthony