What blather. If DSC were on regular TV it wouldn't have serialized stories? Moonves comes across as someone who hasn't watched broadcast TV in 20 years.
Oh, wait, he runs CBS... its bread-and-butter is episodic procedural shows for people whose TV tastes are stuck decades in the past. Never mind.
Regular broadcast TV shows as diverse as Buffy and West Wing have (obviously) done very serialized storytelling very successfully. For that matter, if CBS had done DSC through Showtime or Netflix (as he posits), it likely wouldn't have been any different than it is.
So really Moonves isn't saying anything coherent about storytelling; he's just saying that they wanted to leverage some familiar IP to try to get their own streaming service off the ground. Of course, if he thinks the Nth warmed-over retread of Twilight Zone is the kind of "original content" that'll keep its momentum going, he's setting himself up for some disappointment...