This for me would be good reason to go for nvidia over amd. I had a 6900xt in my living room gaming pc so my wife and I could play some story rich game together. I started out playing titles from the late 2000's like bioshock and I ran into issues in many games. I swapped the card out for a 6800xt, same problems, ddu and reinstall drivers and try other driver versions, same problems, reinstalled windows, same problems, swap to a 3080, problems solved.
Wether or not dlss or rt matters to you depends on personal preference and your situation. I have played many games this year, not one has supported rt and only one has supported dlss, and I didn't need it. Presumably more games will support these technologies in the future, and it would be great to have the option of take advantage of them when possible. RT I can't comment on because I have never experienced it, but I have survived without dlss for 30 years, changing settings so I can play the resolutions I want, and these days I notice less and less between different settings, a few times now I have accidently realised I'm playing a game on lower setting than I usually would and I didn't noticed. I'm also sure that dlss is a very useful technology for many people, especially those on weaker hardware.
I'm not going to argue about performance, there is plethora of evidence from reliable sources showing the performance differences between pretty much every relevant card around today. The OP just needs to spend a few minutes doing a little research, comparing card performance to there prices, as it's his money he can decide what is and isn't worth it.
Both hardware unboxed and gamers nexus have videos with easy to understand performance charts for many gpu's at different resolutions on YouTube, you should take a look at a few.