["Kindness to animals"] is a virtue most easily practiced by those who have never, tired and hungry, had to work with animals for a bare living, and who inhabit a country where all dangerous wild beasts have been exterminated . . . . Heaven forbid, however, that I should be thought to slight it. I only mean that for those of us who meet beasts solely as pets it is not a costly virtue. We may be properly kicked if we lack it, but must not pat ourselves on the back for having it. When a hard-worked shepherd or carter remains kind to animals his back may well be patted; not ours." C.S. Lewis, Reflections On the Psalms.
Doubtless you clever people can see what I'm getting at here. No one should be a "social worker" who has not spent a number of years being the primary care provider for his or her own children. Kindness to the children with whom one spends every waking and often many sleeping hours is a difficult virtue.