A very brief search resulted in this:
https://www.statista.com/statistics/607742/gdp-of-manitoba-c...
If that's accurate, it suggests that Manitoba, which, though known as more agricultural and manufacturing rather than mining, has the same pattern of "real estate" accounting for individual income. Of course, the significant majority of the population is in Winnipeg, but I don't think that qualifies it as a major, on the same scale as Vancouver or Toronto.
Again, I think that even real estate "industry" workers in Winnipeg know their money really comes from manufacturing, just as the ones in Edmonton know their money really comes from oil.
Maybe in the major cities you mention it's not so obvious, but "real estate" still fails to eclipse the sum of all the industries that actually produce something (manufacturing, resource extraction, construction).