If someone took my guitar and had it adjusted by someone else to meet standard industry sound specs I’d be pissed. It’s not just a guitar, it’s my hobby and something I have put a lot of time into to get the specific tone, tension, and sound that I’m looking for. Especially if they paid 200 bucks to have it done, you could pick up a beater guitar, an amp, a synth, or even a used drum kit for that much.

It also just crosses a certain line of respect for someone’s art and personal space. It’d be like if someone was working on a painting and you snuck it away to have it finished by a commissioned artist. That’d be shitty and disrespectful.

Tell me you're missing the point without telling me you're missing the point

I have a friend with guitars he uses for specific songs. This isn't even weird for musicians, let alone artists in general.