Have I got this right? Canon have sold 70m EOS cameras and 100m lenses?
There must be an awful lot of people who have only one lens, and don't really need an ILC.
wrong conclusion. :-)
There are an awful lot of low-end Rebel DSLR buyers, who expect "better image quality than from compacts and smartphones" but will never buy another lens other than the kit lens supplied. Even if they do buy a double-zoom kit, most of them loathe taking along a second lens or changing lenses.
Obviously, they'd be much better served by a very compact, non-mirrorslapping, noise- and vibration-free, sturdy APS-C sensored camera. Something like a G1X II but with a 3:2 sensor, reasonably fast dual-pixel hybrid AF (70D). Fully retractable zoom lens, no need for f/1.8 or so, but rather a bit more tele ... say 18-80mm/3.5-5.6 IS STM. The whole thing priced at a reasonable USD 299. It would sell liek hotcakes. :-)
Instead, Canon believes they can sell the weirdo G1X II for 799,-
... that's why folks still buy DSLRs like Canon Rebels and Nikon D3xxx/5xxx. Each time with a "brand new" 18-55 kit zoom. :-)