Sure, but isn't wealthy the undertone that goes into all these laments that music does not pay anymore? (the original doesn't seems much like a lament though, I read it more like a counter to those laments)

The whole "Let your creative juices flow, somehow gain access to recording equipment and distribution, have a hit record, be made for life", that's mostly over it seems. But it hasn't been with us for that long to begin with. Except for those brief few decades of industrial recording, getting paid for music has always been hard. Depending on economical overall productivity (excess food for entertainment specialists), maybe some or even a relatively high number of musicians would get paid, but hardly ever (or more likely "never"?) so much that their incomes would be envied by productive middle class, including artisans in decorative fields. Remember that before recording (well, before printed scores), music was entirely transient, whereas the products of artisans would routinely be investments in intergenerational status.