Beyond the conflict restrictions, there's another continuing theme in the Journal story, one of Apple executives interfering with the visions of creators of the new shows. One show was spiked before it debuted, others had showrunners replaced, and still others had executives give notes on small aspects of their shows.
Some level of what's called "studio interference" is always to be expected, and has been for long as there have been movies and TV shows. After all, it's Apple's billions that are funding the enterprise. But it's not hard to imagine word getting out in the creative community that Apple isn't a place where showrunners and other artists are given as high a level of autonomy as they are in other places. Adding to this is the possible perception that Tim Cook and Eddy Cue, accomplished as they are, do not come from a background of running or overseeing a TV or movie studio.
Contrast that with future competitor Netflix, which in the last six months has made nine-figure deals to lure three major TV showrunners — Shonda Rhimes, Ryan Murphy and Kenya Barris — from their previous networks. Those deals have granted those creators not only massive amounts of money, but a high level of creative freedom. This is especially important for someone like Barris, the creator of "Black-ish," who frequently clashed with ABC Studios brass over that popular show.