This doesn't reduce the risk caused by people running. It just moves that risk elsewhere, which seems to be a classic railway "solution" to risk problems nowadays.
Yes, it will reduce the number of very late people who run inside the station.
But the subset of people who are a little bit late, but still know they have enough time to make their train's real departure time, will now be forced to run outside the station to ensure they reach the concourse with more time to spare to read the departure boards. Maybe they'll now play chicken with pedestrian crossing lights and be hit by a bus, instead of falling over a suitcase inside the station. But that will never be blamed on the railway, so it's all fine.