You are right that these (well some examples of them) are quality basses.
However to argue everyone would be better off playing them and they would sound as good as other basses is plain stupidity. So Stanley Clarke would sound as good on a Precision? Oh of course he would..........
P and J basses have their limitations. Just look at Marcus Miller - he modified his in a big way to make it fit his requirements.
Well, interesting argument you put forth, but if you are claiming that is what I said, - that is not what I said. You can draw your own conclusions, but you can also leave out words like "stupid" - not necessary at all for a discussion.