You can only call ray tracing a gimmick if you haven't experienced it versus not having it in games where it makes a beautiful difference. Games that I happen to play. Calling it a gimmick is like saying the grapes must be sour because they are too high to reach.
The number of games that have ray tracing or had ray tracing added is significant enough to warrant wanting the best GPU support for it if you have much clue about ray tracing itself, and have seen it in action. It's no gimmick.
It would be like calling tesselation a gimmick, or calling any of the rendering methods that have become gold standards over the years a gimmick. Whether you like it or not, it's here to stay. A gimmick was Nvidia 3D Vision BS with the silly glasses. Gimmicks are things that don't last. Don't hold your breath waiting for ray tracing to go away, is my advice...
Edit: Plus, I can assure you, I didn't spend 1500 bucks for a gimmick, I got the best performance for that feature that can be had in the industry, and that feature is present in most of the games I've played over the last 6 months. If I was into Blizzard games or esports stuff, the 6900XT's brutal raster would have made more sense, but I play next gen games, and a lot of them. I want the features working NOW, not 6 months from now.