In my gut, I think the simplest explanation is it just jumped from animal to human (whether by eating or contact or whatever), since that's how all these viruses spring up.
Anything is possible I guess, so like maybe they were studying a bat virus and had terrible protocols (no evidence for this that I see), but all the stuff about the lab I've seen so far is complete speculation, fomented by people who have an interest in selling something. I haven't seen anything credible that would make me change my gut feeling that this works like every other virus ever, and the idea that it was engineered somehow seems especially dumb.
Smart person