The register is a tech magazine, so the DIY/3D printed angle is relevant here. It’s also relevant because it would, at least to some degree, allow someone to build it themselves in places where perhaps the legality of self determination is questionable. The Register is not a place where you’ll normally find unnecessary clickbait headlines.
They said the same when the crypto hype came along. If AI dies off there will be other trends in computing that require cutting edge silicon. AI may or may not continue surging but hardware will be needed no matter what. NVIDIA is selling shovels, not panning for gold.