Not even that. I am a German myself, and I can tell our heating habbits are on a luxurious level. It is very common in Germany to heat the full house/appartment 24/7 to a comfy level just so you can walk around in light/comfy closes. It is common to not wear thick closes at home and especially not in bed etc. Gas is also used for the water boiler, and it is considered "standard" to shower every day.

Now, if I go back to the generation of my grandparents and to some extend even my parents when they were in their childhood, that was unheard of. You would only heat the main living room during cold winters, and the family would gather. For sleeping you wore pyjamas plus socks etc, and you took a tin with hot potatoes to bed. Showering was not a thing, you would wash daily and maybe bathing on Sundays.

Now that annoys me a little about the whole "Germany needs gas from Russia urgently!" narrative. If you cut out gas for heating/boiling (not electricity), not a single german will die this winter, or next winter. We will lose a lot of comfort, and might have to change our habbits, but we do not have siberian grade winters where having no heating means having to freeze to death.

Oh it's not just Germany. In the Bay Area, California, US, (where you could easily go without any heating or cooling year round like myself) every 10 posts on Nextdoor during the winter is:

"Why is my gas bill $500? This is outrageous. I have 2,400 sq ft. (232 sq. m.) house and keep it at 70F (21C) at all times, so what?"