I specifically state Japan because it has made it legal to train on your works. Good luck winning there. But if the music a work was distributed solely via the means I propose with contractual limits we're no longer counting on just IP but instead on adding additional contractual protections.

The DRM is not what is to stop the training. Of course DRM can be hacked. But if music was ONLY made available via the DRM'd method LEGALLY companies are bound by the restriction and have no defense legally to no following the restriction. The 'time shifting' and 'fair use' loopholes won't apply if they use them to build a commercial product.

Like you are saying, it's pure lawfair and winnable. Your response agrees more with my initial question than you think.