I don't believe this to be true. I consider the likelyhood that the Wuhan Institute of Virology was the cause of this to be much higher than that the seafood market in wuhan was the cause and there's no reason to trust any media or NGO to be truthful in that regard.
The two are not mutually exclusive. For example, some "theories" say that a WIV employee took animals that had been used in experiments, and sold them at the market. I'm not suggesting this is actually what happened, just that there's plenty of room for involvement from both of these entities (or, perhaps, neither).
Having said that, a case could be made that this (lab leak via market) is a distinction without a difference.