But why do they need to emphasize it even more than the examples they gave? The "AV1 with FGS @ 2804 kbps" already looks as good or better than the "AV1 (without FGS) @ 8274 kbps", so it'll definitely look better than AV1 without FGS at an even lower bandwidth.
I think the distinction here is, they provide the "regular" stream, and the FGS stream noting that it's much smaller yet looks similar. What they don't have is a lower-bandwidth "regular" one, what 2000-or-so kbps looks like without FGS.
Isn't that the image captioned "Regular AV1 (without FGS) @ 8274 kbps"?