I agree, I think there's a danger we no longer listen to our bodies, which means if we have a sensor failure or a gap (prescriptions taking an age for example) it's quite a shock. Testing so we know what it feels like to be hypo and to go hypo are useful things imo.
I spent most of my teenage and young adult years going low overnight and would wake up (with a headache, that may have been the alcohol too in the years at Uni, which was the likely cause of being low), eat go back to sleep.
I had one night that sticks in my memory where there was literally nothing to eat in the house I was staying over at so I went to bed hypo, didn't sleep well at all (unsurprisingly), but certainly survived until the morning at which point I got something and felt immediately better!
Certainly there are limits, I don't recommend doing this habitually (though I didn't lose hypo awareness, which is often quoted as a downside), but there were occasions when I simply didn't remember that I'd woken up, gone to get food and then gone back to sleep, OTOH there are the ones I do remember that I'd also try to avoid, like being unable to move one side of one's body until managing to drink some orange juice slumped on the floor, or waking up sitting on the floor in the kitchen clutching the sugar bowl and feeding myself sugar lumps - in the latter case I was really low, once I could stand up I found my blood tester which gave me a reading in the mid 1s, quite a long time after I'd started eating sugar. This was quite unusual though so I'd not worry about it, but rather think that in spite of this I was still able to go and get something (thereafter I simply put sweets by the bed, which made life much easier than having to traverse my then flat to the kitchen and scale the cabinets with jelly legs)