If it were just about dealing with Germany or England, perhaps there wouldn't be a need for aircraft carriers. After all, it shares a border with Germany, and the narrowest part of the La Manche Strait is only 34 kilometers.
Shire only needs to focus on extending the range of fighters and bombers and ensure the advancement of fighter jets to firmly grasp air superiority.
But at this moment, Shire's target is the world's number one superpower, a "superpower" that maintains world peace and resolves global disputes as the "world police"; without aircraft carriers, it's definitely not feasible.
If something happens in Algeria or Egypt, does France use battleships for deterrence?
The range of battleship guns is just tens of kilometers. As long as the hypothetical enemy avoids this distance, they are out of danger. Ultimately, infantry landing is needed to provoke a war to bring the opponent to submission.
