Does personal experience count? Last November, several members of my family and myself attended a social function. Although we had tried to take all the necessary precautions, some of us got sick soon after. We all got sick at the same time... our symptoms were exactly what was being described as COVID symptoms... and fortunately we all came out of it fairly well. My own symptoms lasted about a week and a half. In talking to other people who attended that function, some of them got sick too.
Now... I'm not interested in debating with you about whether it's "caught from outside the body, through the air or surfaces." You've made it clear you're not interested in what anyone else has to say.
I'll just leave this here to lighten the general mood.