As per Cambridge Dictionary: "Audiophile is a person who is very interested in and enthusiastic about equipment for playing recorded sound, and its quality".
As per Merriam Webster Dictionary: "Audiophile is a person who is enthusiastic about high-fidelity sound reproduction"
So with regard to Audiophiles, Americans and Britishers are almost on the same platform. It is about hi-fidelity sound reproduction. Neither of the top two dictionaries mention if Audiophiles actually enjoy music, which is indeed a sad part.
Music enjoyment is a very personal aspect, and is neither restricted to non-audiophiles or audiophiles.
It is just that audiophiles apart from enjoying music, are also analytical about the equipment they use for reproduction and try to achieve more fidelity (which again can be to some extent subjective).
Since I am into lots of editing work late into Fridays and Saturdays, I do listen for long hours into the night for at least 2 days in a week.
I am indeed an audiophile, but do not allow that to be totally outweighed as defined in the dictionary to over ride my enjoyment.
I do take a pragmatic approach keeping in mind the financial limitations and do a lots of DIY to scale that limitation.
Here are some other reasons I am an audiophile:
Cables do make a difference
Speakers are and can be voiced to suit a particular taste in music
Speakers, amplifiers, preamps and DACs can affect the music reproduction quality
Source quality is very important