Aren't you just thrilled to learn that Nvidia is diverting GPU production to dedicated mining cards?
That's probably not really what is happening here. It's far more likely that these are new bins of GPUs that they've already produced, but couldn't sell as GeForce cards. When wafers come back from the fabs and get cut into GPU chips, some of those chips are defective. They commonly have multiple bins of the chips to allow them to sell defective parts.
For example, Nvidia's GA102 chip has 84 compute units and a 384-bit memory controller. The GeForce RTX 3090 enables 82 of the compute units and the full memory controller. The GeForce RTX 3080 enables 68 of the compute units and a 320-bit memory controller. If a whole chip works flawlessly, they can sell it as an RTX 3090. If several compute units or a memory controller are defective, then they can disable parts of the chip, including all of the defective ones, and still sell it as an RTX 3080. That's a lot better than throwing the chip in the garbage.
But what if the video decode block is defective? Who wants a video card that will crash if you try to watch a YouTube video? That can't be sold as a GeForce card at all. But it would still be useful to miners, as mining doesn't use the video decode block. That's hardly the only way that a GPU chip can be defective in ways that preclude selling it as a GeForce or Quadro card. If the memory controllers are fine, but various things that are used exclusively for graphics are defective, it's still a fine chip for mining. So Nvidia is making mining cards out of those defective GPUs rather than throwing them into the garbage.
So does that mean that the miners will buy these new cards instead of GeForce and Radeon cards? While that would be nice, the answer is no. Ethereum currently has a market value of over $220 billion. The demand for miners to get their cut of that is pretty much insatiable. They'll buy these new mining cards and also all of the GeForce cards they can get their hands on. More mining rigs will also mean more competition for the other parts that are needed for mining rigs, including processors, motherboards, memory, and especially power supplies.
The real reason Nvidia is launching the mining cards is to make money. That is, after all, the same reason that they launch GeForce cards. But this probably isn't diverting cards from their other lineups to be used as mining-only cards. This is just another salvage bin and nothing more.