That mentality at Boeing as, literally, costed many lives.
The harm is that nobody knows why there's a memory leak requiring a reboot (or if it's even a memory leak). What happens when that very same issue is combined with a rare case and causes the death of hundreds of people?
"Have you tried to turn it off and on again" may be fine for a $20 Internet-of-insecure-and-shitty-Thing bought on alibaba. Not so much when lives are at play.