Comment by kelnos
I don't think those situations are comparable. Adults in the workplace are expected to get their work done, meet deadlines, act professionally, etc. If an employee doesn't do that, there are consequences, and we judge that adults can decide for themselves if they want to bear those consequences.
We put extra rules in place for kids because their brains aren't fully developed and they very often incorrectly assess whether or not the consequences of an action are worth it.
(And yes, adults are bad at that assessment sometimes, too, but we as a society have decided that at some point we need to take off the training wheels.)