Earlier quoted context omitted.
You're actually making the issue worse by conflating burnout with simple... I guess laziness? In fact the whole reason why burnout is such a fascinating phenomenon is because it takes otherwise highly productivity people who do not hate their job and turns them into minimal-productivity people who do hate their jobs. That's nothing at all like you're describing.
So people who love their jobs can also burn out? I don't buy it. Personally, I've never heard of or met anyone who loves their job and has burned out. Have you?
Maybe another way to look at it is the "burn out rate". Different companies have a tendency to turn excited new tech employees into minimally-productive ones in different time frames.
For example Amazon has a burn out rate of about a year, whereas Google and Facebook are about two years and Microsoft four years.
Why should this be the case? I think people above in the thread would argue that it has to do with culture and working conditions, with moral and with levels of individual autonomy.