Although some human individuals within wet animal markets had serologic evidence of SARS-CoV infection prior to the outbreak, these individuals had no apparent symptoms. Thus, it is likely that a closely related virus circulated  Up to that point I would agree with you. Consider these people having their live. Spitting as they go on chips, elevator buttons for good luck, using each other's toothbrush, exchanging saliva with some hookers.  You think it is reasonable to maintain the place of origin is a wet market? Would it not be reasonable to ask: what caused the change, if for so long people have been running around with it, without a hickup?  What weaponized it?  ........................ 5G?