Sure, you may have an easy access to the airport outside the city centre, but people in the city centre, which constitute a bigger number, have a worst access. And people who are not in the city centre but on the other side also have a worst access to the airport than the city centre.
The comment you answer to is still very relevant: it is true that in average using the train is not as disastrous as one could think (so the disadvantages are compensated by the advantage with regard to environment). The fact that it is not advantageous for every one is trivial and not really relevant.
Also, this should not be decided by the "market", because the market is crap as evaluating mid- or long-term consequences.
In this case France could alternatively levy a hefty tax so that your air travel costs fully reflect the environmental damage it causes. Would that be your preference?
My suspicion is that you actually have not given any thought to this, have no idea about the actual cost of the externalities, and you don’t really care about that either. Instead, you just want to push your personal preference for trains over planes, while clothing this as if you were just appealing to objective facts and principles.
'Better' doesn't make people want to use something if they can save money. The main reason airlines like EasyJet and RyanAir thrive is because they're cheaper, not better.
Traveling by train vs. via one of those planes with minimal legroom and non-relciming seats?
Always better for short haul.
But the prices of trains (or rather: the subsidizing of air travel) make this a non option for many people in Europe. It is literally twice as expensive.
For example, Berlin--Munich. This is a one hour flight. Average price when booking in time is less than $90, I'd say.
By train its over $180. Go figure.
Right now solving the problem means natural gas, nuclear and carbon capture.
"Presumably if factories that don't employ children were better there should be no need for a law."
Trains are better in some ways, and they're wayyyyy better than someone traveling by private jet cause they don't want to ride with the bourgeoisie.
If I would have just hung out in the airport for 4 hours and caught the 50 minute connection it would have been a much more pleasant experience.
The public transportation too the city center is better in european cities than driving. Sample route is charles de gaul to the train station.