Excellent write up by Vanity Fair.
I don't remember dismissing the lab leak theory per se, but rather, taking it in as one of a massive spew of crackpot theories all coming from more or less one source. I'm reminded of the children's story, "The boy who cried wolf."
Looking back in hindsight, I wonder how we could have picked out the lab leak theory as being worthy of consideration, given the context. And whether a more scientifically minded public and government would have faced that dilemma.