Firstly, NVidia loves miners. Thanks to them, they sell millions of cards. NVidia also misleaded their investors when they presented profits from mining cards as profits from gaming cards.
Secondly, RTX3080 goes up to 90MH/s while RX6800 performs the same as a "cheap" RX5700 or GTX3070 - so, AMD seems to be more decent and honest compared to NVidia.
Thirdly, Ether difficulty increases exponentially and soon enough mining profit will be minimum even for $2000 ether price. In addition to this, Ether2.0 will phase out all miners - and the next mined coin is half as profitable as ether! So we'll see a repeat of the RX580 incident, back when Ether had fallen to $100 and you could buy a 8GB RX580 for $100 or so.
There are so many GPUs stocked by miners, that will flood the market when mining is over. And Ether2.0 will not come in 5 years, it will come this year or the next, so, there's no reason making special plans or special cards. Just increase your production! If you cripple RTX3060, you will make it be like 1650! And miners buy everything these days, even RX5500 or even RX570s! So NVidia, stop being hypocrites with your announcements!