Capitalism 101.
Why work harder if you can work smarter without ever breaking a sweat?
Producing a song takes time so does writing a song from scratch. That's if the material isn't subpar, to begin with. In fact, it is an accepted truth that the more millions you make from anything, the higher the chance that you will lose the drive to continuously pursue your passion.
You won't be hungry like you used to from the start and this happens in every business (it's pretty much human nature)—the music industry isn't an exception either unless you are into audio mixing and mastering, you can't outsource that quite easily, you have to do it yourself for best results.
Nevertheless, as a songwriter or music producer, you could always lend...