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.
Not every artist makes art to make a living if it, nor do they need to. Some can’t (e.g. because they don’t have and struggle to aquire the necessary business skills) and some don’t even want that... they just wanna make some art and are happy to do it just as a hobby, no business, no chores... There’s nothing wrong with that , it even has some upsides, because you really absolutely never need to do the slightest sacrifice in your works for economic or marketing reasons.
Art is not a hobby, it's not a labor of love, it's a profession just like web development or project management.