It's like admitting publicly: we are unable to achieve any profit for approx. 6 months in a year, our business model is not flexible (versatile, attractive, efficient, tempting etc.) enough. Even while some other airlines are unprofitable for entire 12 month a year, that does not change the main point made here.
Eh !
Given that the majority of airlines lose money in the winter period then why run it such that you lose even more money.
Admitting that you take direct action to ensure you don't lose millions in winter sounds just like good management.