"A virus whose whole job it is to mutate and infect mutated and infected people."
I think most reasonably sensible people would consider these to be fairly equal in terms of unlikeliness or simplicity. So yes, Occam's razor does not apply, but not because of your particular bias against one of the options.
> that is not supported by any observation
It's supported by at least 3 observations, which is that a leading virology lab known to manipulate bat-based coronaviruses was less than 30mins drive from the potential wet market source, and that China has a history of covering up controversial facts, and that China did at least their usual amount of hindrance for investigators.
I have absolutely no preference for one theory over the other. Or neither. I have no special evidence, and speculation at this point seems pretty pointless.
And unless you do, telling people they're stupid because of their preference is only going to cement their belief in a coverup. So maybe we should quit screaming at people and just say "you do you".
(Just to clarify: Feel free to work against sinophobia... that's perfectly valid. But again, dismissing critical thought on a topic out of hand does nothing but hand the Sinophobes an own-goal)