So AMD are pulling smart marketting tricks with their VRAM but NVIDIA aren't with RTX and DLSS (features used sparingly and RTX which slaughters FPS)?
Well the extra vRAM offers no benefits but costs the consumer, the price of those additional memory modules is passed onto the consumer by making the card more expensive than it otherwise need be.
RTX is a trade off, better visuals but at the cost of frame rate, which DLSS is designed to help mitigate. If you don't think the trade off is worth it then I have no argument about that, extra visuals are always a trade off with performance and each is a personal choice we make based on our subjective preferences. I can only say that I personally want to play games like Cyberpunk 2077 in all its ray traced glory, I'm happy to mitigate the performance loss with DLSS because the quality of DLSS 2.0 and 2.1 is extremely good.