It's not a crazy theory by any means, but, if it happened, then there's evidence. So, where is the evidence? Literally, where is there any actual evidence it happened?
What changed for me is how much circumstantial evidences exists and probably a stronger signal: there hasn’t been another plausible starting point. When something smells this fishy there’s likely a reason. It’s starting to feel like, Occam’s razor - ie that a lab leak is the simplest explanation.