No, many can't. Yes, you can live and survive at colder temperatures, but concentration requires no distractions, and the constant slight pain caused by being cold is enough distraction to completely derail any train of thought.
I take it you don’t have ADHD? The reason people with ADHD often work while wearing noise-cancelling headphones even with no audio playing is because this mechanism doesn’t properly work, it can’t tune out anything.
As result, we need to minimize external stimuli to be able to concentrate. And being uncomfortable due to the cold is one such stimulus.
Decreased comfort = decreased productivity. On an individual level people can cope but on a societal level it’s a real issue. I want a society full of productive people so I want investment in clean energy supplies and high performance buildings.
That's interesting. I realize you can argue about people in general (e.g. 21 is still fine with me!), but how can you negate someone else's feelings? It's like replying "no, you are not" to someone saying "I'm sad."