Broadly speaking, the issue is that cryptocurrencies drive up demand for GPUs, and that makes them less available/affordable for gamers. If there was a crypto-crippled GPU then it would be exempt from that particular demand.
And since the amount of GPUs won't go up magically by inventing another product there will be too few anyway or the price will go up. There's nothing to win by doing so which is why people condemned Nvidia for doing it.
Many people believe the intent was to prevent a glut of gaming gpus when crypto crashes. If you get miners to instead by crypto only ASICS or "mining gpus" then can't be resold.