I like this cautionary video.
It's hard to evaluate our ideas about dinos and nuisance algae, because people generally have one display tank. So there's rarely ever a control to pair with the experiment.
Seeing how people often implement the ideas about nutrients and dinos in ways that can be more harm than help, I agree that the more conservative approaches are the better ones in terms of likelihood of long-term positive outcomes.
On the other hand, when somebody posts pictures of ostreopsis dinos attaching directly to live sps coral frags, the pictures of that frag in the next 48-72 hours will show tissue loss and death. A zen approach doesn't really address the issue. So get UV like he says, keep the dinos off the coral colonies - those things are kinda urgent. And everything else can be done with patience.
Also many people find the elegant corals method to be helpful, and it's as opposite as you can get to this. Slam the system for a few days with massive carbon dose and bottled bacteria (which might or might not participate in the bloom). It overwhelms surfaces with heterotroph bacteria, displaces dinos and cyano, depletes nutrients rapidly etc.