The winter here in the Netherlands is also really mild. I'm in a 4th floor apartment with the main room facing the sun with all windows. if I clothed a bit warmer than normal I could go without gas until winder ends.
Of course not everyone lives in a small apartment facing the sun but still.
I echo this sentiment, and I am from Poland, with much colder winters. We could stop using it for heating, spend the year preparing for winter, spend a lot on insulation and then electricity, and dress warmer -- but we'd reduce the dependence on Russia. Totally worth the trouble and hardships, and long overdue.
Of course not everyone lives in a small apartment facing the sun but still.