If you'd red the whole thing you'd found that those numbers are overblown. Fps of a 4070 should tank in 1440p and run out of VRAM but doesn't.
Even with PT it's fine
Optimization is supposedly fine because it looks the part. Optimization doesn't mean make everything run on old hardware. It means make it run as well as possible. There's only so much you can do while retaining the fidelity they're going for.
DLSS is a thing thou