His point still stands. Lack of evidence for one thing shouldn't be confused as evidence for something else. A man is home alone during a murder, and there is no evidence for this, did he commit the murder?
If CCP are covering it up, then of course there will be a lack of direct evidence. The above doesn't prove it conclusively, but it does make it rather suspicious. Why would CCP be hampering the investigations if they have nothing to hide? It was over a year before they let the WHO have a look. Plenty of time to get rid of any actual evidence.
There's also the reports about the leaked state department cables from 2018: https://www.washingtonpost.com/opinions/2020/04/14/state-dep... But I couldn't actually figure out where to find them, so you can discount that one as "not enough evidence to verify".
Those things aren't conspiracy theories. Yes, its not enough evidence to prove it either, but damn does it make them look shady.