I think this is where we differ. That obnoxious spiky little ball we all now know as coronavirus(es) existed in both humans and bats long before making the "jump". Ignoring the possibility that humans are directly responsible for the new host capabilities, it's not like we watched influenza slowly morph into a coronavirus and cause a new form of havoc. All we saw was an existing "species" that had mutations inside the bounds of its genetic code that enabled it to survive elsewhere.