I care about many things I can't see, touch and experience. I ain't never been to the stars and yet I still care about the space program. Plenty of folks care about a higher power that nobody in the history of mankind has been able to see, touch and experience. And in the reverse, there are plenty of people at intersections begging for food and money that we overlook and don't care about, despite being able to see, touch and experience their need and suffering.
Now you're using less than empirical data, but I understand, it is to make a point. Unfortunately the point falls flat because people begging at intersections for money/food are rarely homeless or suffering. My local news station did a story on this very thing, investigating it pretty thoroughly. Most of the panhandlers have money and/or means; many of them are drug addicts, etc. And they get plenty of cash. They found that the average money made by panhandlers was between $60.00 and $300.00 a day. Also, our local police academy makes their cadets go out for one afternoon and beg at a street corner for experience in how these people operate (they give the money to charity). Their experiences also support this information. So, in fact, you have proved my point inadvertently. People DO care what they can see or touch and experience.