I am still confused how people think that it being an accidental "lab leak" is any more damning of the role China played in the initial outbreak. China made a lot of mistakes and also kept other countries in the dark for way too long no matter the origin. It can also serve as a warning against authoritarian models of rule.
My criticism doesn't mean I think we shouldn't investigate the origins either. It is in the world's public interest to err on the side of knowing too much so that maybe the chance of this happening again is reduced.
It's typical CYA stuff from corrupt institutions that cannot abide transparency. For some, the appearance of having made a mistake or having been incompetent is so uncomfortable that they will stonewall all possible investigations to avoid looking like they've made mistakes. Even when those mistakes were just that--mistakes.