People just won't do it....

People basically won't do what they don't want to do. If they agree to do something they really don't want to do then they will find some technicality on the way or some anecdotal reason to get out of it - if they are not willing to step out of themselves for another person.

That last sentence is the key. When these same people look outside themselves to a higher power, namely Jesus Christ, then there is the sole motivating factor that makes a self-focused person an other-focused person. Then and only then will they consistently do what they don't want to do because it is the right thing to do for a loved one.