I don't see anything bad in living and dealing exclusively with the music. Someone said me when you get material return from your creativity, it becomes not creativity,but job. You start to create for the conveyor, for money, turn the creativity into a product. I think that each case should be considered individually. For someone it turns out to be true, but then this person already can't be regarded a creative person, a musician. He becames an manufacturer. The same thing happens in other creative professions. So if you do your own thing sincerely and at the same time get not only spiritual but also material payoff, there is nothing terrible. After all what's wrong with that really make people happier? Art for the sake of art - that's what really matters.