Boy howdy. That's one article that takes a one year blip in statistics and a few select interviews to turn into a fictional trend if I ever saw one.
Canadians have been emigrating to the US since before there was a Canada.
Here's an article about Canadian emigration to the US which is less dramatically slanted and shows a small decline in overall Canadian population in the US (note that overall the population of both countries has been growing significantly while the base numbers of emigrants has slid a bit.
Take a look at where the hot spots are - Florida and California - the states with clement climates. Take a look at how many are retirees. I spend a lot of time down south not because I see greater "freedom" there (in fact I see a growing theocracy) but because its a lot warmer in January and February than up here. Some industries pay much better down south so attract Canadians (health care professionals who earn their degrees here for a tiny fraction of the cost that they do in the US) while many fields are attracting no Canadians (most trades and service workers who are generally poorly paid in the US).
I disagree with many of his "micro" facts. Food in the US, for example, is more expensive now than it was. The post pandemic price rise has hit them hard. During my most recent stay there I was paying roughly the same in American dollars as I would pay up north in Canadian dollars for a comparable product - but with the American dollar being worth 30% more that was a significant change. As an example, a case of 12 x Coke at a Walmart in the US today is US$7.84 while in Canada it's CA$7.48. In fact I was paying over US$9.00 back in February. The bargains are mostly gone (thankfully there is still far more variety in what's available - just try to find an El Paso Enchilada kit up here)
"... a lot of prospective buyers are motivated are motivated to leave Canada because of politics," says one real estate agent who hates Trudeau and has moved to Florida. Now there's a statistic to be trusted. Funny that the recent "surge" of emigrants comes during the middle of a Biden administration. During the Trump years it was dropping (but not an amount to be statistically significant either way.
A lazy and shallow article.