You're not wrong, but "we've been winging it for decades" is not necessarily a good defense here.
That said, I do think they did look at their performance numbers and made a conscious choice to lean into feeding these more power and running them hotter, though. Whether the impact would be lower with more conservative power specs is debatable, but as you say there are other reasons why trying to fake generational leaps by making CPUs capable of fusing helium is not a great idea.