I think the big issue here is the ad hasn't tackled the point about why women don't ALREADY check if a man who looks distressed is ok.
The idea presented here is that women just aren't interested or they don't see it as their issue.
In reality women are looking at this advert and are focusing on her safety. Which explains why women don't already approach distressed men at stations.
If this advert had gone to a focus group with lots of women, it might have picked up on this issue.
Thus, how successful do we think this advert will be in practice? Will women really put their own safety concerns aside? It's doubtful.
The Samaritans should be thinking of a way and campaign that might address those concerns and enable women to act in a way they feel comfortable which helps the man on the station.
Just effectively chastising women for being afraid to intervene in the context of major awareness campaigns about women's safety isnt s good look because it shows a blind spot about WHY this isn't currently happening.
It's something of a circular argument which shows the Samaritans are missing the point.