Couldn't agree more, hence my tag line below every post. There's a lot of different types of music out there and a lot of different venues that music will be played in and equipment it will be played through, not to mention a million different band members with their equipment and playing styles. That all adds up to understanding which tool is best for which job. Painting yourself in a corner by eliminating entire classes of tools is pretty short sided.
Since we're trying to avoid car anologies I'll use knives instead.
To me a Jazz bass is like a nice pocket knife, it's handy, if you want to whittle and do a bit of carving it gets the job done. It even has a small blade and a larger blade for different tasks, not exactly a deadly weapon but in the right hands could do serious bodily damage. By comparison a P bass is more like a sheath knife, a bigger blade, plenty deadly, but can still be used for whittling. I'd place the Thunderbird at the Bowie knife level. Very large blade, menacing, very deadly yet still can be used to whittle if you want. My Warwick basses fall more into the machete category. They can hack down small trees but you'd be hard pressed to use them to make toothpicks.
Of the bunch, I find the TBirds are really in that sweet spot where you can do anything from somewhat delicate work to full on menacing if you want. Just a bigger badder version of the P bass with a bit more top and bottom end.
Am I getting rid of my Jazz and other basses, nope, there's still a time and place for them. But because the Tbird is so versital I'm playing those other basses a whole lot less and smiling a whole lot more.