Re: How come...?
Where I sleep, there's electricity. Gadgets put down for the night are almost always plugged into power, and so that would be the perfect time to do updates. Gadgets have access to all the information they would need to make much better decisions about when to perform or allow updates.
Your response is exactly the sort of 'can't do' attitude exhibited by the people running these organizations. It's a failure of imagination, and a failure to have a vision of an improved method. Perhaps there's a failure of attention to detail. Perhaps it's a lack of hands on experience in the circumstances where such improvements would be valuable.
These failures are the root cause of gadgets still having such very annoying characteristics.