A disease can come from anywhere
Unless you're trying to imply that China engineered the whole thing - extraordinary claim that will require extraordinary evidence
Imagine you have most expensive disease in human history by economy standpoint and after 6 years we have just claims of where it came from. Isn't that suspicious enough?
They did downplay the effects of covid and spread misinformation about it as well as silence the researches and journalists who were first trying to ring the alarm bells