My understanding is there is a concern that cryptocurrency miners are buying GPUs, using them for a few weeks to determine which ones they can overclock, and selling the ones they can't (and have probably limited the life of in the process) since you can probably sell a 30 series GPU for more than you got it for, even if you're upfront about it being used.

All of that isn't possible with the mining-focused line, so Nvidia feels they need other tools to help convince the cryptocurrency miners to move over, hence the block.