And I'm European and can't concentrate below 22-24°C, because it's too cold. 24-26°C is my ideal temperature. (But then again, I'm a woman)

Additionally, having a too large difference between inside and outside isn't just annoying but actually dangerous and even painful when going from 18°C indoors to 34°C outdoors.

There's no contradiction there. Paying for an A/C system that only needs to work for one week per year during the peak of the heat wave is terribly inefficient. It doesn't mean you can't complain about heat especially since it affects far more than just your home (like being outside in any capacity - pedestrian, cyclist, driver, passenger).

Expect it is not a week. It is like 2.5 months of complaining. It has already started. People are talking about freak heat waves and breaking heat records, just like last year and year before that and the year before that and...