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Hello Floofy with your fellow floofies!
It's mechanically fragile, that's very true.. but such a complex construct "has" to be mechanically fragile to some level.
That's how "bugs" in information technology came into reality: just by insects and rodents crouching and biting in a "nicely warm" computer system.
Nowadays it's even more sensitive, but quite well protected. But even the static discharge of rubbing your hair with a synthetic clothing would destroy even the most modern AI, if directly "injected" into the processors or storage media controllers without protective circuits catching the voltage spikes.
As such it's understandable that sensitivity comes out of complex concepts. One of the reasons I for multiple years developed very complex electronic concepts which as well were all-day-use robust in the hands of users - not experts. A stressing job.
But: your mind, the goals of it.. are very, very robust, actually. The most of it is subconsciously selected and what you "feel" and "think" willingly about - the higher consciousness - is just a sort of emulated "open world role play game". It's not in power of doing everything or anything "basic". You can't die by willingly stopping to breathe. Neither by willingly diving or willingly touching hot, sharp or comparable stuff. You would need a spontaneous decision and a way to initiate this without actually having time for the subconsciousness to "cancel" this effort. If there's no way for it to cancel the outcome.. then it will not be able to do anything.
But as long as it -can- interfere willingly and prevent the outcome, your lower management in the subconsciousness is a hell of a drug labor. It will do anything and everything to keep you alive. It does not want to die. No matter how ill your body is or how broken it appears, it wants to stay alive.
Humans only "notice" this mostly if they die.. and then it is too late in most cases. But if the subconsciousness could actually block the outcome, it would prefer to rip your organs in shreds by abusing them and to drug you up with adrenaline as well as other drugs to a level which keeps you functioning.. keeps it living.