I, too, was raised with mention of children in Africa. In college, I met some young adults from Africa (Ethiopia, to be exact) and they were tthe wealthiest young men at the college. I was poor with barely any food to eat, a broken old car and they drove new Mercedes.
"worse off than me" can have a lot of different meanings. For example, I read once that suicides are more common in situations where, outwardly, the victim appears to have it all going for them and suicides are less likely in a forced migration or poverty-stricken soul with everything against them. Sometimes worse off can mean owning nothing and creates a drive and positivity to fight for a change and survival. Sometimes worse off could mean working your whole life to obtain every material good, lovely house, wonderful partner and lavish holidays but if there is no happiness after that, who is worse off, I wonder.