On the other hand, it is comparing Apples to Apples.
The Gods didn't deliver specs to Apple for Intel machines locking the company to placement/grades/design/brands/sizes of chassis, fans, logic board, paste etc. Apple, in the Intel years, just prioritized small form factor, at the expense of longevity.
And Apple's priorities are likely still the same.
My concern is that, given cooler-running chips, Apple will decrease form factor until even the cooler-running chips overheat. The question, in my mind, is only whether the team at Apple who design chips can improve them to a point where the chips run so coolly that the rest of Apple can't screw it up (ie: with inadequate thermal design).
If that has happened, then... fantastic, that's good for consumers.