We don't have the laws to make that happen though - thats why they do it, not because individuals care, but because they can be fined for not doing it.
This then leads to things like tyre hotels so people can store their spare set of wheels/tyres, which enables people to achieve it.
I believe German car leasing also often includes the wheels/service to facilitate it too.
However, we in the UK don't have the same continental climate you see in Germany. Our weather is influenced by the ocean, its a wetter but not hotter/colder place. Our main condition our tyres need to cope with is rain.