Because tech demos do not represent what we see in our actual console games and Keelly is just spouting PR. We see the same line spun every generation along with the whole "X console will out perform PC" nonsense.
Don't believe me? Look up a video of the tech demos for UE4 or even UE3. The games never hild up to the tech demos, as tech demos often portray performance not attainable in practice on retail consoles.
There were loads of posts about lowering expectations after MS did their showcase, but the Unreal demo had the exact opposite effect. Sure, previous unreal demo's weren't always realistic but they were also way more abstract. This was an actual playable demo running on a ps5. Personally it showed pretty much what I was expecting from next gen consoles.
My guess is that Sony will have gameplay footage during their reveal that'll look similar or even exceed the Unreal demo. However, if MS goes all out with their "smart delivery" strategy, I'm not sure they'll have that same wow factor.
So a scalable engine demo designed to work on the beefiest of PCs to next gen consoles all the way down to Fortnite on smartphones showcased “pretty much what you expected from next gen consoles” and yet Smart Delivery would somehow prevent that from happening for Xbox, even though it is literally the same idea, taking a game and scaling it up for better hardware. Per usual, you aren’t making any sense.
Halo Infinite could look amazing on XSX, as good as any PS5 launch title or better, and still have an Xbone version. You do realize they aren’t mutually exclusive, don’t you? Again, this very UE5 demo you’re so impressed by is proof of that.