As opposed to current America?
Scientists can still asses information and evidence with that in mind and still say which option is more likely to have happened. Or even say that China has faked evidence if they did so.
>In these situations we rely heavily on intelligence services
I don't think intelligence services are equipped to do this. But if we go by who has the better data, better equipped and resource I would assume that America wins on that, so should we believe them more?
https://archive.dni.gov/files/ODNI/documents/assessments/Rep...
>The National Intelligence Council and four other IC agencies assess that the initial human infection with SARS-CoV-2 most likely was caused by natural exposure to an infected animal that carried SARS-CoV-2 or a close progenitor, a virus that probably would be more than 99 percent similar to SARSCoV-2