Don't be so sure that all, or even most, junior employees know any such thing. I've seen junior employees fired for doing silly things in prod before[1]

[1] Of course whatever more senior bozo granted the junior the rights to blow up the thing(s) they did should have been fired instead. That's not the way things work in the corporate world.

I like getting juniors into situations where they can blow up a db since it's the perfect introduction to backups.

And we only do it once (I didn't kill the db, but I did kick off a process thinking I was in a test environment).

Were you the guy sending test push notifications from Firebase to all users of Xperia phones last year? :D

Them knowing that it is bad isn't much of a consolation for the dead production

The magic that happen in someone's mind that leads to their actions matters very little for everyone else. Their actions and the consequences of their actions are what everyone else actually cares about