Or you don't have to confuse direct contact with indirect contact.

There are different layers, different relationships affect people differently. Not all relationships have to be tight.

Like you might care a lot about your immediate family ,but care less about your friends, care even less about your neighbor, and even less about your community.

So the farther a person it is from you, by relationship, the less you care. It's not a black & white issue, as if you only care about your family and nobody else.

There are layers of care, and yes the farther it goes the less people care. Like for example I care almost none for a random person in Asia, but I do care about principles in general.

So if my principles can be extended across the spectrum, then that will in turn effect that random person. So even though I did not care, I still do care, indirectly.

This is where you are confusing direct relationships with indirect ones.So indirect help can just be as beneficial, if it does have very positive effect on people.

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Like not polluting a river. You might not care about every single person that drinks there, but it's in everyone's interest for the water to be clean. Same about the air, same about anything else.