Would you uproot your life, leaving behind your family, your job etc if you dont like the weather in a country.
(Obviously theres always more than one advantage of moving someplace but to build a life somewhere, would weather be top 3 factors in choosing where to live).
Yeah, it's pretty normal and will become more normal as agricultural strain becomes worse in equatorial regions. I suspect it will depend on the immigration context of more livable countries, in which case you might have more community moving with you and you can struggle together in your new home.