Setting the room temperature to 17/18C when people are dressed in summer clothes and 23/24C when people are in warm clothes

[Multiplenames10]

Am I being unreasonable to think people who do this are illogical?

To me it makes much more sense, is more comfortable and environmentally friendly to set room temperatures to higher in the summer (but still comfortable) and lower in the winter when people are wrapped up anyway.

Wondering which country this is. Is this Germany? My experience of Germany (mostly Munich) is they have great insulation and good habits of opening up all the window wide for a few minutes every so often and 'changing' all the air , but not letting all the heat/cool from the fabric of the building dissipate.

I lived in the USA for a while, in a place that was a quite a bit hotter than UK and I had no AC in my flat. I was extremely hot at times and survived with box fans in the window and going to bed damp after a cool shower.
People did spend a lot of time in their cars! They would drive everywhere, even a short walk (and not only when it was hot).

Because your health doesn't take precedence before everyone's elses.

We set the AC to 28C in order to cool the place down from 36+. In the winter heating is used under 17C only.

But surely health trumps inconvenience. Because that is all it is. Not wanting to carry a cardigan. Or in the case of some at my old work, insisting on keeping their desk that's right under the air con vents and then not allowing anyone to put it on, rather than agreeing to swap desks with someone who'd appreciate it!

I'm not saying it should be as low as 17, that's a bit much. But low 20s is reasonable.

I'm not talking about a cardigan. I'm talking about negative impact of too intense cooling on people's health.
Temperature shock (caused by too big difference between outside and artificial cooling inside), drying of membranes making people more likely to get sick, sick building syndrom (soar throat, stiff neck, dry eyes).

If the outside temperature is 28, reasonable inside one would be around 23, keeping it acceptable inside and not too big difference.

This. I don't understand the question. We don't have heating on in the summer.