But in science at least you always should test against the null hypothesis, and that is purposefully not done here like in many other "conspiracy theories". Note I'm not saying that the lab leak is necessarily a conspiracy theory or that it can not be true, I'm simply talking about the way of arguing. The way a lot of conspiracy arguments are being constructed is that they take a number of events which seem relatively improbable if regarded from general experience and then use that as proof because "it's impossible for these events to happen at the same time". However, looking in detail at the number of events occurring events actually become very probable (I mean there have been several instances of people winning the lottery twice).