You don't get it. You can't use someone else's property (including intellectual property) for free. Investment went into creating that intellectual property (housing, food, instruments, studio time, hours of labor from musicians, producers, engineers, mixers, masterers).
Just because Hertz or Avis is not getting anything from me now doesn't mean I can use their rental car for free for 3 months. I certainly can't use Apple's Logic Pro or Final Cut Pro for 3 months free. The coders/programmers need to get paid for their creation. I can't use my neighbor's lawn mower for 3 months free. I can't live in a rental property for 3 months free.
Giving something away for free devalues that commodity. It's not the artists giving away a song for free as a loss leader to sell an album. It's a 3rd party giving away someone else's intellectual property away for free to help sell the 3rd party's business.