The emissions from aviation are increasing every year, the majority of flights are for holidays rather than business, and only a very small minority of people globally actually take flights.
However, I belive the parent commenter was more pointing out the unfairness of picking and choosing what to ban rather than imposing a blanket charge on carbon.
This seems to have been missed by most, even when considering that the parent is likely correct that flights have a greater, and increasingly greater, impact on climate change than bitcoin does.