That is not the official line. The whole point of that widget on the lock screen is to perform behavior that is not codified in OS settings or available directly to __ANY__ external developer outside of Apple.

When a "Bug" seems to oddly fit in favor of a native OS's paid feature uptake, call me skeptical when i don't think it is a "Mistake", i mean what are the odds that Apple Music launches, the team is under pressure to deliver subscriber numbers and suddenly this behavior shows up?

The whole approach to Software companies where ridiculous behavior like this are tolerated in recommendation engines in feed or in OS level features that are anti competitive by nature and dismissed as a "Transient bug" by people who should know better is not right.