I do not believe the M6II, M6, M5, M50, G7X II, G5X or G1X III are aimed a casual shooters and they cost considerably more than the entry level DSLR's that for many years made Canon their money.
But what doesn't the M6 II do that any crop sensor MILC does? Why is the M50 the 'content creators' darling? Same for the EOS R now they have gotten used to it! I think people are far too dismissive of Canon and even their current mirrorless cameras.
I think he does have a point, however, in that Canon hasn't released a mirrorless as good as their 1 series.
You've also both forgotten the really-low-level point and shoots that cost less than US $200. I believe one model is still available, and even if not, the sales of those are no doubt part of the number of mirrorless cameras sold that exceeds the number of DSLRs sold....and those were indeed casual shooter cameras.