If you were a Cisco engineer with that mindset then that would certainly explain the never ending barrage of Cisco related vulnerabilities... Joking aside, a machine not being hacked does not mean that it's "unhackable".
It could just mean that no one with the skill tried to hack the machine.
Also, didn't they use to say that the PS3 was unhackable? It's not the first time that word has been thrown around lightly and proven wrong.
I don't see why you think that the Switch 2 is unackable after only about a year after its launch?
Do you know something about the Switch 2 that the rest of us don't?