There are occassional outages. But the pylons are designed with icing in the mind and that does the difference. More outages are due to poorly trimmed trees falling on wires than ice itself. That usually affects only small area and can be fixed quickly.

Or a crane barge not making it under the power lines overhead:

https://www.cbc.ca/news/canada/toronto/hydro-one-downtown-po...

> We are living in a developed world with working infrastructure.

You're welcome, we bombed all your infrastructure into oblivion about 80 years ago, now it's all new! And also, your country is quite a lot denser than North America, so you can bury every single power cable (though you don't, obviously) and if you think -10C is cold, just wait until you see what much of North America experiences during the winter.

Sure, as I said, different geographies have different requirements.