And I mean it's not really because we're uncaring people, it's just human and societal nature. It's not even just looking after yourself, but unless you are supremely empathetic AND a great activist, we're just too disconnected as a society to have our lives changed by these events. The more distant you are from something, the less it will affect you. That's just objective nature.
You would think with the internet and media these days that we'd be more connected than ever, but all it does is provide acknowledgement. It does nothing to actually make it relevant. Kinda one of the biggest problems we have in civilization as a whole.