I had a nice long post typed out but you aren't worth the effort. You're arguing to argue, and your whole post is splitting hairs. Ray-marching is ray-tracing, just another technique. Brute force is raw power, and can be in the form of a specialized chip, but isn't a requirement.
RTX is a gimmick, just like PhysX. The industry is moving that way anyways. Nvidia brute forced it and bank rolled a few games to make their name synonymous with the technology. You can't do what an RTX card can without it because they lock you out of it. But even Nvidia have let non-RTX cards process RTX, because the hardware isn't necessary, just helps.