Telling musicians to evaluate and choose their instruments in a “scientific” way?

It's the actual musician that makes an instrument sing, not how exclusive the instrument is. A better sounding instrument will  however, inspire the musician to play better.

A good player with a cheap guitar vs a hack with a very nice guitar will always draw  more attention.

To your (the OP's) point:

https://onlinelibrary.wiley.com/doi/10.1002/anie.202105252

https://arstechnica.com/science/2021/09/study-confirms-superior-sound-of-a-stradivari-is-due-to-the-...

“It's the actual musician that makes an instrument sing, not how exclusive the instrument is. A better sounding instrument will however, inspire the musician to play better.

A good player with a cheap guitar vs a hack with a very nice guitar will always draw more attention.”

Just like the best possible system you could put together with an unlimited budget wouldn’t be very appealing if you didn’t have any good music to play through it.

Tone is in your fingers. And your cables. And your fuses. And your amp. And your microphone. And the room conditions. And your equipment. And the stability of the power, cords and connections. And what media your using.....

As a guitar player myself, I like my tone to ooze from the speakers like liquid lava.

Where does it all end, man?!?!?!?!?!?

For those who don’t get what this is about, I’m trying to point out how ridiculous the things some people keep saying about how we should evaluate our equipment are, when applied to the music we love, and the instruments it is played on/through.

No one questions when a craftsman chooses materials for, and builds, an instrument guided by his ears, or a musician chooses an instrument the same way. Dare to say you build your home music reproduction system this way, though, and you will get all kinds of grief.