The population of southern Ontario is ~13.5 million people (roughly a third of Canada).
North Korea has a similar area (slightly larger), but approximately twice the population. South Korea also has a similar area (slightly smaller), but approximately twice the population of North Korea = four times the population of southern Ontario.
In particular, ~13.5 million more people live in South Korea (which has an area smaller than southern Ontario) than in the entirety of Canada.
Toronto, Ottawa, Montreal and Quebec City are all in this region. It may not be as dense as Korea, but the Korean peninsula is one of the densest parts of the world so this isn't saying much. If you visit this part of Canada, it feels much like the urban/suburban sprawl of the American North-East across the border.
My point is, that looking at the population density for the entirety of Canada is misleading because most Canadians don't live in Yukon Territory. The population density of the part of Canada people actually live in is much closer to what you'd expect from a typical developed country.
https://en.m.wikipedia.org/wiki/Southern_Ontario
The population of southern Ontario is ~13.5 million people (roughly a third of Canada).
North Korea has a similar area (slightly larger), but approximately twice the population. South Korea also has a similar area (slightly smaller), but approximately twice the population of North Korea = four times the population of southern Ontario.
In particular, ~13.5 million more people live in South Korea (which has an area smaller than southern Ontario) than in the entirety of Canada.