Every Nvidia card has CUDA support from day one, regardless of who the market is for it. I wouldn't much as much if all their slides weren't covered in AI, AI, AI, and it didn't ship with some stupid LLM chatbot to help you tune your GPU.
When I explained my non-technical friend who is addicted to ChatGPT that she could run models locally her eyes got lighten up and she wants to buy a graphics card, but she is not doing any gaming.
I think having CUDA available in consumer cards probably played a big part in it being the de facto "AI framework." AMD would be wise to do the same thing.
Developers introduction to a technical ecosystem is more than likely using the card they already own. And "It'll likely be supported eventually" just signals that they're not serious about investing in their software. AMD is selling enough CPUs to finance a few developers.