Don't be so sensitive, dude.
The issue is that these thread often get so cyclical when perfectly reasonable speculation based on a knowledge of the industry, gets called out by some new entrant into the thread who's basing their take on PC retail components. Then folks have to explain why for the next few pages... rinse and repeat.
Also, given that there are no 7nm CPU or GPU currently available on the market, equally the person's speculated specs in question provided no indication of ALU count on the GPU, i'm not sure what you're basing your die size claim on at all.
We have no idea what transistor densitites 7nm will deliver, nor what the Navi microarchetecture looks like, nor the exact config of the PS5, nor even how much of the die will be devoted to i/o, cache or the memory interface. So any speculation on die size for a given TFLOPs perf number is literally finger in the air, pie in the sky. Not to mention that TFLOPs performance is based on GPU clockspeed, which for a mainline console isn't going to be clocked as aggressively as the Xbox One X, so any comparison there won't be very useful.
In the end, the die size of a PS5 may in fact be larger than the XB1X, but not by much, and it doesn't need to be to deliver 10-13TFLOPs of SP GPU compute -- you're only talking 80 CUs at 1270 MHz, which should be more than doable on 7nm for < 370 mm2 (i would imagine).