1 There is no such one home buyer called "Canada".
2 Exclude the GTA and Vancouver, recalculate the average price increase. (Those are not the only locations one should be living in.)
3 Exclude the most and the least expensive 3%, recalculate the average price. (One 10-million property raises the average by a huge margin whereas one 50K property has a much less impact, as the average is closer to 50K. Besides, I cannot see how my life is affected when someone pays 10 million for a property.)
4 The article ends with no real suggestion apart from saying "I am an addict". "Families should spend their lives in rental units until the home prices go down, which may never happen." Is that the unwritten suggestion? Living  in rental homes is one guaranteed way of keeping your mood low.