The flight shaming that you're talking about is a North European political view. Which even in that small part of the world, only 50% of people subscribe.
I won't go into why I think it's a nonsense but needless to say it is. Aircraft manufacturers are rapidly working towards emission free technology. We have emission free technology in virtually all other areas yet we don't use it. Why? Because it's too expensive for the campaigners. Aviation doesn't effect the campaigners life, so that's what they pick on.....