Trouble with native is you need to use a form of AA that is actually good. That means it tanks your performance. If you use FXAA or TAA which is what comes in games these days that certainly does look worse than DLSS. For me anyway.
There are some games I found you can get away with no AA at 4K like Tomb Raider games. But then you got games like Prey where it is jaggies galore. Then you enable TAA and it looks like vasaline smeared all over the screen relatively speaking. For that game I actually make use of DLDSR which means no need for AA. It tanks the fps but as the game is old it is not an issue to still have high enough fps without using DLSS as the gane does not have it.
And the issue here is that all the supposedly good aa factors like msaa, smaa are in fact pretty awful looking as evidenced in multiple games by multiple sources unless you can tolerate the ant crawling effects, shimmering and flickering and this is even an issue at 4k (although less obvious than lower res.). Personally not for me as it is immersion breaking but each to their own.