Simple answer to your question. A good guitarist makes money from playing well, and can afford to buy a good guitar, a bad guitarist makes shite money and therfore don't waste it on something he has already. (Q)Definition of a good guitarist? (A)knowing why they put more than the first 3 frets on a guitar! But yes my friend you do have a point, i have a 1970's Martin D1. a beauty, nearly plays itself, anyone who disagrees with this theory, simply should forget about guitar playing!
Glad to be of help!