Lmao. We do need ac though, the problem is Europe has a ton of older houses which were build when it was much more beneficial to try and keep warmth in rather than out. And it’s a pain in the ass to retrofit all these houses with ac. I live in a flat which was build about 15 years ago and the difference compared to my previous apartments is enormous. Still no ac, but it’s not needed here because of proper isolation and smaller windows.
I moved into one of these buildings about 1.5 years ago and it’s indeed awesome. We also have no gas and tons of solar panels on the roof so last year with the insane energy prices in the whole of Europe I spend €2,83 for all my energy including heating for 8 months, and I’m easily cold so I always have the heating on. The only problem is as you say to get rid of heat in summer, but they opted for smaller windows than is standard so less heat is getting in in the first place. And because of the great insulation you also have pretty much no traffic noise from outside. The only complaint I have is that the mechanical ventilation can get quite loud when it’s windy outside, but the benefits are so overwhelming I can’t be that bothered by it.