How does a virus leaking from a laboratory even approach the ridiculousness of a 9/11 conspiracy theory when cases of e.g. SARS have been confirmed to have leak

How does a virus leaking from a laboratory even approach the ridiculousness of a 9/11 conspiracy theory when cases of e.g. SARS have been confirmed to have leaked from labs just like this one? This article just establishes strong indicators that the virus was under research at the lab - that alone is perfectly plausible and requires no conspiracy. You don't have to take all the facts in the article at face value but the basic idea is plausible.