While people remain in denial about how nice it is to only have 2-3 months of livable outdoor weather a year, housing prices will always tell the truth
Housing isn’t really a “market” that can be efficient at pricing in all information because it’s different for everyone (relatives, taxes, jobs, immigration, race, etc).
The places you listed have milder weather, and far less sunshine than most of the US but they also have hundreds of years of extra history and development. Moving from the US to there has far higher friction cost than moving between states.