You could argue that, but it would be silly. First off, the RF 800/11 alone costs 2.5x what the R100 + kit lens costs, meaning it's still a pretty expensive lens compared to entry level APS-C cameras.
They may very well offer those 'mid-tier' lenses in the future. Their resources are finite like any company, they've indicated they plan to launch 6-8 lenses per year and they seem to have kept that pace. That means they need to prioritize, and there are any number of lenses they could make.
The segment of the market interested in supertele lenses is likely pretty small. Consider something like the 24-105mm standard zoom range – Canon offers a 24-105 non-L for $400, a 24-105/4L for $1300, and a 24-105/2.8L for $3000, so three tiers. There's a 24-50 non-L, a 24-70/2.8 and a 28-70/2, also three tiers. 15-30 non-L, 14-35/4L, 15-35/2.8L. In other words, for more common focal lengths Canon already offers three tiers.