Wake up: it's a consumer product. IMHO, it's a bad design, if a speck of dirt can burn down your house.
Yeah, this looks like an attempt at blame deflection for a bad design.
I guarantee you will see this connector change, regardless of how much they say the design wasn't the problem.
It's definitely design failure. If Nvidia had to use new and unique connector for high power high current, they knew it will fail one day. They should introduce 24v or even 48v power instead, very common in other industry design.
A friend of mine who purchased a RTX 4090 for $3000 CAD, just had this happen after playing for 3 hours straight with visuals cranked up. Only a .1 percent chance?