Part of the problem is that historically, AMD was just flat out bad. Its no so much as thinking of Nvidia as a luxury brand as not even realizing AMD or Intel are valid options. Even if things get better, it will take time for public sentiment to shift, given that people aren't replacing their computers often.

For example, I got a Vega 56 for cheap near the end of the generation. I had constant issues with it's drivers, and my whole friend group was obviously exposed to them when we played games together. Seeing that, reasonably, they decided they wanted to stay away. Given that my friend group is relatively technical, they're opening up to AMD again as people say the issues have improved, but if I had a less cheap and less technical friend group, that experience would have completely burnt that bridge.