Most of the blur in games comes from the temporal AA component, not the actual upscaling. Atleast that's the case for DLSS. It's why certain agressive DLAA profiles look blurier than default DLSS Q despite the former being native. Same is true for TAA vs DLSS Q in certain games, like RDR2 for example.Older generation game look is fine. Blurriness isn't. I don't need the bleeding edge all the time (especially with a 6750 XT), but I prefer my image to be sharp if possible. It's just my opinion, though.
Besides if you actually care about sharpness you'd be on Nvidia as the DLSS circus method is pretty much the only method to properly get rid of blur from TAA in AAA games, unless you force TAA off but that breaks a ton of stuff and introduces a ton of motion artifacts.