I’m sorry but you’re just talking of your ass there.

Portuguese Air-force assets, including fighter jets, are constantly deployed to the Portuguese Economic Area for missions such following the naval assets of hostile nations passing through or near it or even investigating possible criminal activity. The maritime EEA of Portugal is way larger than the actual country and at times the only vehicles that can reach further out enough fast enough are fighter jets.

Furter, fighter jets are literally the only kind of significant help Portugal would be able to send within to its Eastern European partners in the EU and NATO if Russia invaded them (certainly neither the Leopard tanks or regular infantry would get there for a while).

By pointing out that the land territory of Portugal is at low risk of invasion you’re actually making the point in favor of fighter jets since those assets make a lot more sense than ground-based assets for a country whose main military demands are on a huge sea area off its territority including far-away parts (around Madeira and Azores) and its military obligations in the two large military alliances the country is part of.