To use it usefully, you should judge if this situation shouldn't have ever existed by your moral views.
So for instance, "billionaire gives graduating class free college" has the situation where college debt is horribly crippling, and that if we taxed the money billionaires have accumulated, then college could've been paid for with that anyway, without relying on a single person's generosity.
This situation, though, could happen in any society. The baby being at risk can happen to anyone and is a mistake on the parents part. A man saw a baby in danger, and risked breaking bones, possibly death, to secure the baby. That's behavior France wants to reward, and they offered something within their authority.
The only argument I can see to contrast that would be something like "immigration should always be allowed" or similar, but that's a Greg area.
This situation, though, could happen in any society. The baby being at risk can happen to anyone and is a mistake on the parents part. A man saw a baby in danger, and risked breaking bones, possibly death, to secure the baby. That's behavior France wants to reward, and they offered something within their authority.
Even further, it kind of sends the message that France wants this kind of person in their club more than "yeah sure dude you deserve to be French now".