This is no way exonerates the Wuhan government from possible culpability—indeed government officials did deliberately suppress information—but this investigative opinion doesn’t pass scientific muster. Misinformation.
RaTG13 is the closest virus found in the wild to SARS-CoV-2. Samples of it were shipped to the Wuhan lab, which does so-called "gain of function research"--AKA experimenting with artificially sped up mutation rates. Not very long thereafter, SARS-CoV-2 shows up in the surrounding metropolitan area with a very, very similar genome. They're the nearest siblings on the phylogenetic tree.
It's only politics which keep people from calling this the smoking gun it really is.