Well, we know how to unleash it in a really dangerous way. We don't yet know how to get net power from fusion in a way that doesn't involve enormous explosions, though it appears we're getting close.

No. We know how to do it safely. It just requires a large (expensive) machine. The thing we're getting close to is making the machine small enough to make it economically viable.

I'm guessing they phrased it slightly awkwardly and meant net positivity by profitability. Since technically we can release energy via fusion but we always have to spend more energy than we get out.

It was the second paragraph that made me think they were referring to financial profit, but we could well be all in vehement agreement.