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.
The (theorized) problem was that wild-caught land-animals happened to be part of the selection.