A huge part of the security of Macs is that the security domain is a single chip. Hard to do with an airplane which is inherently a physically-distributed system.
Defenders have to think about multiple threats. Explosives are harder to get, conceal from certain types of scans, and are more overtly deliberate. Neither of these is a common threat but that doesn’t mean people don’t harden against low probability/ high damage events.
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This is far less true than it used to be, though, and it seems reasonable to expect that aircraft become as secure as Macs.
A huge part of the security of Macs is that the security domain is a single chip. Hard to do with an airplane which is inherently a physically-distributed system.
But what if the device contained an explosive?
Defenders have to think about multiple threats. Explosives are harder to get, conceal from certain types of scans, and are more overtly deliberate. Neither of these is a common threat but that doesn’t mean people don’t harden against low probability/ high damage events.
I mean, if we're going to ignore physical attacks then yeah an airplane can be as safe as a computer I suppose.