Feel free to explain
Minimizing the number of people you come in contact with minimizes spread. You can’t stay 6’ apart on a plane, but you can stand 6’ apart in the terminal, and the people you come into contact with in the terminal aren’t the same people on your plane. And even if they are, they might be in a different part of the plane from you and will never come into contact with you.
It’s really simple. Less contact = less community spread = fewer cases = fewer deaths. It’s so simple that being an idiot isn’t even a excuse for not understanding it. You have to be willfully shutting off part of your brain.