If it's just up and down to the South of France why use a jet?
Remember: The guy has won the lottery. Money is no issue. Why should he get his tooth fillings shaken out at FL 200 when he can have a quiet ride at FL360? And a lot of people are really scared (and unimpressed) by anything that has propellers on it. I know because I have flown those things for 20 years. The man needs a jet, nothing else will do!
What Next - you have a job like that and you want to get out of aviation????
There is always a big difference if you fly because _you_ want to fly or if you _must_ fly because somebody else _wants_ to fly (and you have no other way to pay your bills). I would certainly not give up recreational flying if I win the lottery, but getting up at 4:15 in the morning for other people? Certainly not.