Why is the lab leak theory so taboo? I dont understand why this would want to be glossed over? If a mistake was made why are we not learning from it? Why would

Why is the lab leak theory so taboo? I dont understand why this would want to be glossed over? If a mistake was made why are we not learning from it? Why would China care? its not like anything would change if they admitted a mea culpa here. I just feel like so many factors point to this not being a 'wild' virus it just didnt make sense to not investigate if this was a lab leak. Lets learn here and do better.