That NVidia marketing has done a brilliant job in brainwashing people to believe that RTX == real-time raytracing. It isn't - it's a clever way to take a minimal implementation to deliver select effects on top of largely rasterised graphics without allowing the noise and inaccuracies from the minimal implementation to be too obvious.
Real-time ray/path tracing may be the future, but the current "RTX" implementation is only an initial stab at it with the current limited resources that can be economically (debatable, at that) applied. It's just smoke and mirrors at the moment, and I'm not prepared to pay for it.
In the meantime there is still value in improving rasterisation performance - frame-time consistency, lag and minimised jitter are extremely important; turning up eye-candy on an inadequately capable rig causes major and minor stutters that cause me to feel motion sick, and RTX is something that makes this worse and not better.