I'm also not sure your guitar analogy stands up - my two favourite guitars at the moment are an Ibanez archtop that cost me a lot of money (by my standards anyway), and a no name electro-acoustic that I got second hand for nothing and customised with a soundhole pickup to get a really huge sounding electric guitar.
The analogy only doesn't work if you're determined that it doesn't!
Nobody is saying that expensive, or even good gear automatically improves the underlying performance or that it is somehow more important than the artist. What we are saying is that the idea of good recording equipment is not just some kind of gear snobbery or a case of people wasting money and kidding themselves that it works. It really DOES make a difference when used properly.
Of course, buying something expensive doesn't guarantee success, but there IS such a thing as improved quality. I bought an expensive guitar that I ultimately gave away because I never clicked with it in the way that I hoped. Another guitar that I play regularly wasn't very expensive. But that doesn't prove that cheap guitars are always as good as expensive ones. There are always exceptions, but what you really want is quality coupled with something that's a good fit with whoever uses it. And, more often than not, you usually have to pay more to get better quality.
If you're not interested in getting better recorded sound, and you're happy with what you get now, then that's absolutely fine and good. There's no absolute 'need' to keep buying better. Most of us will find our own comfortable level of gear quality and stop there, at least for a while.
People who don't want to pay more for music equipment in general will also often tell you that buying better gear won't or can't make you play better. Depending on who you are that might be true for some people, but it's not true for me. For instance, I had an old but adequate amp, which certainly could have been used to play good music on. But when I bought a really good one the difference was not just immediately obvious, it was inspiring. I sat there for hours just playing and playing and revelling in the quality of the sound and the places that it could take me that the old one couldn't.
If you don't want to spend any more money on more recording gear then don't. If the art of recording doesn't interest you much then there's no reason to push yourself along a road that has no attraction for you. If you can't hear the difference between a cheap drum kit and a better one, or don't value the difference, then why bother with it? If you can't hear what good equipment does for sound, then wait until you can or until you really feel that it would be worth having. But if you can appreciate or value what makes something better then it might be worth the money. It might even encourage you to lift your game all round. Only you can find the answers for your own situation.
Do you personally 'need' more expensive recording gear? No. Don't buy it because you feel pressured to do so, or because you think people will look down on what you have. But don't kid yourself that we're all wasting our money on better gear that doesn't do much, because we're not. Honestly.
Chris