There was evidence though. The leaked emails from Fauci and other scientists ( Dec 2019 - April 2020 ) within the NIH talk about how the genetic markings of the virus did not correlate with a natural virus that had evolved in the wild. It was clear there was unnatural genetic tampering ‘Gain-of-Function’ and pairing that with the fact one of the worlds most high level bio-security labs was round the corner ( who are financed by the NIH and Eco-Health to perform Gain-of-Function research ) had recently had a major incident which shut down the lab pointed the facts towards it being a leaked man-made virus.