I think that is the most likely scenario, but too many coincidences * are happening.
https://nypost.com/2020/02/22/dont-buy-chinas-story-the-coronavirus-may-have-leaked-from-a-lab/
* The only biowarfare laboratory being located in Wuhan.
The original theory was that it came from bats, to change to it jumped from bats to some intermediate animal 20-70 years ago.
China accusing US that Us made the virus.
China launching directives to be extra careful in coronavirus research.
The cases probably starting in November, not in December as we thought, and China immediately arresting the doctor who detected it first.
The research in finding a vaccine being lead by a military expert in bioweapons.
I still think that it is very likely that it came from wet markets, but I wouldn't be surprised at all if it was leaked somehow, and then China was doing cover-up which made the situation even worse. So for me, in the last few days the conspiracy theory has jumped from close to 0%, to it might be possible though it is still quite unlikely.