Because that 60% from coal is more or less shared across everyone, but flights are, on the global scale, a luxury item. In many cases, taking a transatlantic flight emits more CO2 equivalent than your average person commuting for a year.
So even though aviation is a small part of it all, it is one of the individual actions able to have outsized impact, usually for leisure or at least often for non-essential reasons.
So even though aviation is a small part of it all, it is one of the individual actions able to have outsized impact, usually for leisure or at least often for non-essential reasons.