I understand what you're saying but keep in mind that when Catalan is not available, the language that tends to be used isn't English, but Spanish.
Knowledge of Spanish in Catalonia is not by any metric bad.
Knowledge of Spanish in Catalonia is not by any metric bad.
A quick Google suggest it has a) more native speakers than English, b) more total speakers than English, with only Chinese ahead of it.
That must dampen enthusiasm for learning other languages.