Why no guidance from the Good Book on how to prioritise?

Why is Christianity so unhelpful on the very ethical dilemma that most concerns ordinary people in our everyday lives? Why does Jesus have nothing helpful to say about the ranking of obligations?

Last weekend, digging a huge hole in the ground to receive a gargantuan granite trough I’ve just bought, I was about four feet below ground level and wielding a pickaxe when, with a panic-stricken tweet, a fledgling coal tit fluttered down into a puddle in the depression. There were high winds on Saturday and I suppose the bird had been blown from its nest somewhere.

This one managed to half-fly, half-hop to the water’s edge where it stood tweeting desperately and trying to fluff out its wings to dry them. It could nearly fly, but not well enough for the required vertical take-off. I watched for a while; the bird was not quite viable, I thought, outside the nest — yet so close.