The CIA is not a neutral party in this. Discrediting China may well be their goal here. A lab leak is not impossible, but there are good reasons to suspect a natural spillover event. There have been a number of studies that point in that direction; e.g. recent genetic analysis that suggests that the Wuhan wet market was the origin. https://www.cell.com/cell/fulltext/S0092-8674(24)00901-2
US will keep discrediting China as long as there is no conclusive evidence of what exactly happened. The burden of proof is on China. But let's be honest if it was a lab leak of this scale and consequences in US, US wouldn't admit it as would probably no country.
Dr. Tabak testified in this hearing that the NIH was funding gain-of-function research in Wuhan, China through a grant to EcoHealth.
Of-course this was in "direct contradiction" of the earlier testimony given by Dr Fauci under sworn oath. But hey - he has already been pardoned for it.
The only thing that can be laid at China's feet is ignorance of what was going on in their labs and the useless attempt at media suppression once the virus got out. However, anyone who has studied the facts in detail would easily form the judgement that a subsection of the U.S. government had the majority share of culpability.