Just a couple of comments in passing.
Ummm, yup, the P Bass works really well. Particularly for getting a solid sound on a recording. Shouldn’t really be a revelation at this point. But, still good to see cats disproving the hypothesis to the contrary.
Regarding emulating an “upright tone” on a bass guitar: to begin with, whose upright tone? Eddie Gomez? Charles Mingus? Paul Chambers? Willie Dixon? Edgar Meyer? In case you haven’t noticed, the upright cats have been busy cultivating a wide array of upright tones for just a little while. An Eddie Gomez tone sounds almost nothing like a Willie Dixon tone. Just saying.
Anyhow.
There are techniques you can learn on the bass guitar to satisfy an uninformed BL. They are good tools for the kit.
Going back to the Jazz Bass; first of all there is no need to denigrate the Jazz Bass in order to validate the Precision Bass. That’s just the wrong way to think about things. The Jazz Bass is a little bit more complicated. In particular, players have figured out that the stock Jazz Bass performance is highly dependent on signal chain. To get the best out of a Jazz Bass, you have to pay attention to your signal chain. That may mean changing pickups, adding onboard preamps, getting the “right” amplifier, using the right cabinet, using the right DI. Etc.
And, there are plenty of righteous examples of what the Jazz Bass can do both recorded and live.
So, enjoy the P Bass. It well may be the only bass you need.