Maybe the Belgians said thought he is the best person to play joke on.
Isnt it obvious?
When a country buys say Maritime planes like you said and a plane like Rafale, it would do so for its own security, It would be very funny for a country to buy such a plane (remember Rafale is a CATOBAR plane) and hence it will need a CATOBAR CARRIER,. Thus in a way, when Belgium buys French Rafale so that it can fly from French carrier, why the hell to buy it? Just pay the French as mercernaries so that they can take the targets down for the Belgians...
You really see how stupid it sounds?
There can be one way, if the Belgians are paying for the planes and the French are using them paying the Belgians for loaning of the planes (Lend and lease) so this way the Belgians buy the planes and lease it back to french and the Belgians make some moeny in the process and some coutries do that. The Americans had leased F-16 to Pakistan. The Russian have leased us their nuclear sub,
In the context you say the Belgians plan to buy F-35, I might say thats a good plan, F-35B is a CTOVL plane which is also VTOL as that might more sense in terms of flexibility. During the falkland wars, the British had used their Harriers from a "converted carrier"
If that way, then if the Belgians want to go into action now, they cannot, because CdG is in for repairs. Do you really think that a country will depend on another country for its defence specially a country like Belgium?
As of now, I am really interested to know what the Chairman of French defence committee smoking
If the chairman of the Defence Committee says it then you can rest assured it is not a joke. He is in contact with his Belgian counterparts and is relaying what they want and getting the Rafale M gives it a distinct advantage when they have to explain the choice to the voters. The idea of Belgian fighters flying off nuclear carriers is a very powerful image.