Why is that the case? Tools like OpenCL do exist, but I assume CUDA is simply better suited for these tasks, is that true?
(With the dominance of CUDA, choice of a GPU on Linux gets even harder. It used to be a clear "fuck you Nvidia" if you wanted to use Wayland, but Nvidia definitely has the lead when it's about video editing and machine learning.)
AMD's OpenCL implementation and tooling on Windows is terrible, even worse than NVIDIA's OpenCL tooling, and on Linux their ROCm stuff has been so unreliable in terms of its hardware support that it isn't worth the investment.