I don't disagree that this is not necessarely a pro-consumer move, but is it really anti-consumer though?
If your product is becoming effectively dual purpose (and one of the two sides of the market is completely overshadowing the other), it's not all that strange to differentiate your offer to cater more directly to one side of the other.
I mean, sure it sucks for those people who wanted to use GPUs both for gaming and for mining, but how wide is that bracket of people really? And this definitely will "help" the gaming side of the market to some extent. So it's really hard to gauge how much of a net positive or negative it will be overall.
The point is, cryptomining is in a bidding war for the same resources as PC gaming, and the situation is serious enough that if nothing changes in the next 2-3 years, the gaming market as a whole will start to really feel the ripercussions in terms of lost customers and revenue. So companies that operate in the gaming market moving in a protectionist way to artificially separate the two and give some breathing room to gaming has a lot more to it than "muh removed features".