This is the viewpoint you adopt when you believe in natalist politics but blame individuals rather than the material conditions they must cope with.
Natalism comes from a few different sources. Some of them are religious in nature ("God commands us to be fruitful and multiply."). Sometimes it comes from an econometric analysis ("We need more workers to be economically competitive."). Sometimes it comes from a humanistic desire to see people happy with kids. Usually though, it's not that last reason that people start talking about "selfishness". The most relatable and forgiving reason someone might act like this is that they want grandkids and are salty about it.
Natalism comes from a few different sources. Some of them are religious in nature ("God commands us to be fruitful and multiply."). Sometimes it comes from an econometric analysis ("We need more workers to be economically competitive."). Sometimes it comes from a humanistic desire to see people happy with kids. Usually though, it's not that last reason that people start talking about "selfishness". The most relatable and forgiving reason someone might act like this is that they want grandkids and are salty about it.