It's possible those cards are being made with chips that are too defective to output video. Unfortunately only Nvidia knows for sure and they're not going to say anything truthful about it.
All of the mining card SKUs except one were confirmed to be using older Turing-based architecture on a completely different fab and node (and one that's not currently bottlenecked to the same extent as TSMC 7nm/Samsung 8nm are).
So they are not harvested silicon, but they also don't compete for fab time either.
If the cards were cheaper, or even the same price but available, then I doubt there'd be an outcry. But they charge more, for a surely defective part.
It'd be like buying a car and finding a clause that says if you manage to make money off of it they'll take a percentage or "brick" the hatch or something, to prevent your profitable usage. Nvidia should back the fuck off and just sell a product.
Even if they were cheaper miners wouldn't like them: one thing which substantially reduces miners' operating costs is the resale value of the GPUs they are using. They can buy a GPU, mine on it for a year or two, and then sell it for ~50% of its original value (or even higher in today's markets). The mining cards with zero resale value (which will much more quickly become landfill) would need to be substantially cheaper to make this worthwhile.
