Personally I think the biggest problem is that NVIDIA's power profiles are inherently self-destructive for these cards and made just so folks can brag about GPU speeds and it only gets worse when folks use something like DLSS 5 which w/o proper configuration is going to hammer the card and drive maximum power draw.
I know folks get sick of car analogies when it comes to tech hardware but this reminds me a something an old mentor always stated when it came to modifying a vehicle: Never make a change if the vehicle isn't already performing to spec and capable of doing more without incuring damage because if it can't already, something is bound to give. There's plenty of stock engines that are already doing close to their max design and pushing them more will likely result in damage.
When it comes to 5080s and 5090s, especially 5090s, both are often doing more than they should out of the box and pushing further without taking the appropriate measures is very likely going to end badly. It's like throwing a turbo, supercharger, or nitrous on an engine that's already overheating and not expecting something bad to happen.
I swear, I feel like NVIDIA should've included a disclaimer that said, hey were giving you these things in a state in which they can literally have a meltdown but here are some tips to avoid that. This is nothing like the old days where performance was left on the table for those willing to look into unlock, some of these things are pretty much already near-redlining out of the box.