The Bruce Willis story isn’t actually true;
http://techcrunch.com/2012/09/03/bruce-willis-itunes-music-library/

But lets pretend that it were for a moment – the point is that while you can easily copy your iTunes library and give a copy to one (or all) of your children, there is no way to transfer *legal ownership* of the licence for digital media. (Similarly, you couldn’t legally rip your own CDs in the UK until 2011. But you still can’t legally rip copy protected DVDs in either the EU or US.)

Apple Music *is* DRM free. But the copyright system is still catching up with the reality of digital media in the 21st century. Media “ecosystems” exist to protect the existing model of copyright, backed up by the likes of the DMCA/EU Copyright Directive.