So You are arguing that the meaning of the word in the English language can change from a lute maker to a bowed instrument maker when the style changed, but not from a bowed instrument maker to a solid body guitar maker?
I am pretty sure that in American English, (and probably British English) the term Luthier would be used to describe the maker of stringed instruments with necks, eg guitars.
Likewise Hamilton won the title last year - even though the Firarri was a quicker car and Alonso was getting better results than that awful McLaren disserved.
But you are right going from a AC to a Stenback, to a Harley Benton will not make you a better player.
me changing my Golf to a Mercedes Benz, or Citroen C1 will not make my commute to work any quicker. Some people will justify the cost of the Merc. The Citroen driver may look at me and wonder how I can justify the cost.
So even though we probably agree that the bass, or car, is not the determYou are basically arguing that your choice of fender custom shop (like my Golf) is far better than the Merc (which you’ve never driven) because the merc is unaffordable (to you)?