I don't understand why AMD can't be bothered to pursue this
AMD can dominate the market for general-purpose CPUs while NVIDIA is dominating the market for special-purpose processing units (and Intel is busy executing its diversity and inclusion strategy).
amd has the hardware (so do in house solutions) but not the software ecosystem for rapid deployment at scale right now. a lot of the ai investment right now is fomo from big players caught with pants down, not appropriate to proejct into long term.