I believe I also remember Coach Zo saying that. IIRC, the context was a question about whether or not this Murfreesboro kid is a true PG or a shooting guard that would be forced to run the point out of necessity. I got the feeling, as you alluded to, that he was compensating for the fact that he is going to make the best out of what he has but that he's not actually convinced a PG isn't necessary. Like he was spinning a bit for the reporter. Of course, I'll go out on a limb and speculate that at some point he also said "score the basketball" in there. (cringe)
Personally, I don't believe for one second that Zo really believes his "system" (and I'm not yet convinced it's actually a system) can work without a PG making quick reads on the fly and probably also calling timeout when his coach seems to forget that you can do that.
Trae was a decent player but was also frustrating bc of the inconsistency - most of us had seen with our own eyes what he was capable of and just wanted to see more of it on a regular basis. That said, he also was in the news all 3 years for getting publicly benched, and more than once the question was raised publicly of where his head was at when it wasn't on basketball. Maybe Zo was just lamenting the fact that he had been trying it for two years without being obvious what he meant.
Now, commence with the judicial affairs jokes....I've set you up...ha