My own experience: Don't ever trust the Chinese government on issues that could potentially involve the reputation of the party. Note that I'm not saying don't trust what CCP says, ever (sometimes they actually do good things) - just not on issues that involve anything to do with how the world might perceive them.
Which is exactly what this issue is about.
That's not to say we have compelling evidence that this was a lab virus, either. I think, for me, it's a, "we don't know, but I wouldn't be shocked at all if it was a lab virus".
If this was some sort of lab mistake, as the conspiracy angle suggests, IMO that's much less embarrassing. In the "real" explanation, thousands of mainlanders are regularly eating food contaminated with bat shit, with zero health standards. In the "conspiracy", they're a first-world country doing groundbreaking science, and an accident occurred.
I think they're probably telling the truth.
That's old information. The first cases of the virus had no connection with the wet market, and no connection could later be found other than it was the first major subsequent point of spreading for the virus. So it's much more likely that people spread it at the market, rather than that it came from there.
However, they are indeed disgusting third-world wet markets and the practice of consuming bush meat as well as having live wild animals of all different kinds together in a wet market is an experiment we shouldn't be conducting. The risk to reward ratio is way too high. Remember that HIV likely came from butchering and consuming contaminated chimpanzees in Africa. The world needs to put those kinds of practices behind us, it has cost us far more than it can ever be worth.