I get what you're saying and I also completely understand why people have become desensitised but there's nothing more dangerous than an apathetic society.

We can't end world hunger, but we can atleast feed a poor person. We can't end child labour, but we can atleast sponsor a child's education and basic necessities.

Just because we can't end it all doesn't mean we shouldn't try and contribute to make our society a better place in whatever way we can.