You're saying that because most zoonotic viral transmission don't come from wet markets, fixing wet markets should not be done. And that because some people cr

You're saying that because most zoonotic viral transmission don't come from wet markets, fixing wet markets should not be done. And that because some people cross the boarder illegally, boarder controls that keep out the vast majority of people should not be implemented. The problem with your reasoning is that it doesn't acknowledge that preventing some zoonotic viral transmission is better than preventing none. And reducing the number or rate of infected people entering an uninfected population is better than no reduction.