Self-care is good, because it means that if we take good care of ourselves in turn we can take care of others too. It's what Stephen Covey in
The 7 Habits of Highly Effective People calls Sharpen the Saw:
And:
For instance reading the romance novels recommended by Laura for me is like sharpening the saw while also moving up on this upward spiral of growth and change, which will make the lives of our nearest and dearest (much) easier.