Of course; we've all seen that. New RF lens: lighter, smaller, ?? better optics. If Canon wants to signal that the R series is for demanding pros, they need the glass that serious pros will want to use. See the new 50 f/1.2 as an example.
Pros are smart -- and cheap! They don't buy new glass for the sake of new glass but because it fills a need. Sure, someone with a new EF 400 f/2.8 III isn't buying the RF anytime soon. But there are lots of working pros who would be in the market for new glass. Canon needs to have something for them.
Hmmmm.... lighter, smaller. You didn't get the memo?