Unfortunately this advice is irrelevant (or suicidal) in many climates. Canada’s prairie provinces are completely unridable for 3-6 months out of the year.
https://www.youtube.com/watch?v=Uhx-26GfCBU
TL;DW Oulu, Finland is as cold and snowy as any population center in Canada. Plenty of people bike there year round. The issue is municipal infrastructure, not climate.