This is a poor attitude to assume about artists (I'd also challenge your assertions that 99.9% of people in rock groups "love" dealing with broken down vans, shady promoters, and trying to understand the nuance of record deals). They're putting in hard work just as anyone, and even if they love what they do, they're doing it to make a living. This type of thinking that devalues art and artists.

Art is not a hobby, it's not a labor of love, it's a profession just like web development or project management.