That count is a bit deceptive, France has a single aircraft carrier with fixed-wing aircraft, the Charles de Gaulle. The other three are Mistral-class amphibious assault ships with helicopters.
The recent conflict in Nagorno-Karabakh proved that the future is here, and no large asset is safe from drones. Even if carriers could deny airspace to cheap tiny airborne loitering munitions (they can't), they have no hope against the submarine variety.
Source: https://en.wikipedia.org/wiki/List_of_aircraft_carriers_in_s...