Of course I do not believe it the way you portray it. It is called a 'sliding scale' for a reason, my friend. A 'slippery slope'[0], if you will. Completely different from 'directly comparable'.
At the top of the slope, it's "merely firmware, what is the problem?". At the bottom of the slope are warcrimes and genocide. It is very hard to stop sliding down a slippery slope once you've started.
So when you disallow Linux on a laptop you are very much at the top of the slope. And there is a long way to go. But my, oh my, it sure is slippery.
Because we live in a digital age. More and more so. And in this age, there is no way to have 'checks and balances' without access to the source code of the software. And without checks and balances, it is very hard to have Separation of Powers[1].
Interestingly enough, I've found that survivors of WW2 tend to understand this better than most.
[0]https://en.wikipedia.org/wiki/Slippery_slope
[1]https://en.wikipedia.org/wiki/Separation_of_powers