>>debacl+(OP)
True, but Apple has so many interesting spaces it could grow into through M&A activity as opposed to putting ads in its TV service. Off the top of my head, wearables and gaming are just two that could promote a ton of genuine growth as opposed to promoting pirating by introducing ads.
There are plenty of whip-smart folks at Apple, surely they know people adopted streaming services due to lack of ads, and have the ability to pirate stuff pretty easily.