I find this disconcerting. 1) everyone has different reasons for taking flights over trains. Markets should decide the economics of it. Government shouldnt.
2) There is no clear impact thesis on carbon on the environment of France. It is probably close to zero. If not negligible. 3). Not for you but for them. I dont see elites, powerful politicians taking the train. All the reasons will be given. Teams need to move, security, time constraints, nearness to the airport etc. 4) private jets while being attacked in France will never be banned. In fact because of this ban on flights I would expect an increase in private use/lease/ownership. 5) These kind of measures hurt the poor. When you have no competing options, prices go up.