You can’t reliably answer “How to prevent X from happening again?” Without first reliably answering “How the hell did X happen?”

I’d like to know the answer of where it came from and I’m open to possibility of it being a lab leak. But actually knowing how it happened is basically irrelevant to the planning we need to do for the next one. There will be future viruses, they could come from many different sources, we need to be prepared irrespective of the source.