I don't know. I haven't heard of any major outages as a result of this guy not doing his job properly, and if it's just the one guy... why replace him with software? It doesn't seem worth it.
If it ain't broke...
It's not just "turn those and those supplies on when the show ends" but actually managing the best possible supplies and possible exceptions. Plus, the show ending is a very visual example, but I'm sure not always (and not everything) is up to EastEnders credits rolling.