There's a big difference between them not marketing it and them deliberately sabotaging it.
In this particular case, perhaps not because it's aimed at the hardcore crowd anyway. However, the Pro had not been received well following the reveal and I think it'd be disingenuous to pretend otherwise. It only slowly recovered after we saw high-quality videos and comparisons.
But we've all seen them attempting to zoom in stills to sell the console. Yet, you're telling me that those same people would then turn around and undersell the 45% better performance when 1. it was told to the devs and 2. it would completely undermine what Cerny was trying to show off. You're postulating that they purposefully self-sabotaged, but we can see that's impossible because they tried their hardest to show the difference in those zoomed photos, something someone who's not trying to sell you a product wouldn't do.
I don't see why we're doing mental gymnastics to justify their screw-up. It's simple. PSSR is a big selling point and combined with the 45% better rasterized performance, we're looking at potentially 88% performance over the regular PS5 for the same image quality. However, this is hard to show in youtube feeds because they're compressed and capped to 60fps. Furthermore, a lot of people watch on their smartphones or tablets where it's even harder to display the difference in image quality. Sony's only other choice was to upload the video in advance so they could have a high-quality 4K HDR feed ready, but this also ran the risk of the video getting leaked before prime time like with GTA VI. They didn't take a chance and opted for a shitty video that suffocated the real differences. That's really it and this is all demonstrable and provable. I don't believe for one second that they would downplay the console's capabilities on purpose, especially not when we saw them in the leaked docs.
Downplaying a halo product's capabilities is so comically counterintuitive I don't even know why we're arguing this.