People are still in "I can get a GPU" mode. Let a generation or two go by and see what happens to people's interest when they know they can't get a GPU. These are just little consumer products and when it comes to stuff like that people are less interested in things they can't buy. If GPUs go away why would anyone care about them anymore except for miners? Well there's my answer! All the review cites and youtube channels would simply convert to mining channels. Problem solved. I keep saying cites. I mean sites.
I suspect that you're just making up excuses after the fact to try to justify your reasoning. Imagine I were to tell you that there were vampires living in your attic and you decided to give me the benefit of the doubt and actually check instead of just dismissing me as a complete nutter. After reporting that you didn't see any vampires in your attic, if I were to say "Well duh, that's because they're invisible!" would you honestly accept that reasoning?
Let me put it this way. Is there anything I could actually say to you to make you consider that you're possibly mistaken in your beliefs? If regardless of any amount of evidence I could produce to show that your assumptions are incorrect, etc. you just rationalize it all away after the fact then there's no real point in discussing this with you because you've already made up your mind and likely don't want to hear anything that contradicts your own conceptualization of reality.
Frankly I don't even care enough just so that I can be "right on the internet" because it's not really that much different than arguing with someone proclaiming that the world is going to end in two years. I probably can't say anything to dissuade them and the world is still going to be here in two years anyway. But frankly I shouldn't have to do any of that. You've done absolutely nothing to even suggest what you're saying is correct and the burden of proof is no your to support your claim, not for me or anyone else to refute it. At best you've stated an opinion, but I'm not sure why it's better than any one else's opinion or why I should put any more stake in it than any other similarly unsubstantiated personal belief.
Maybe you are actually correct and this is a real problem, but you've done absolutely nothing to demonstrate that it's anything beyond yet another opinion on the internet. If assuming you could buy a GPU right now would you prefer a review that recommends card A because the reviewer believes that it's really great and you'll have an amazing experience with it or a review that recommends card B because data shows that it performs better, consumes less power, etc. based on a pre-defined test methodology that wasn't just created on the spot in order to make that particular card look good?