It would affect all of “your” humanity for sure.
But it seems that “you” want to affect their humanity more than yours…
Yes, probably “you” want to end that sorrow more that yours…
One of the reasons “I” feel that way is that deep down “I” don’t feel part of them, part of humankind. I feel special, different. It’s logical because I feel an identity; “I” am an isolated identity. “I” don’t feel humankind as a whole; “I” can’t; It’s just a projection of “my” sorrowful humanity, to which “I” do have direct access. So that sorrow is not “my” sorrow, and wanting to end that/their suffering is probably a way to avoid ending “my” suffering, which would put “me” at existential risk.
It’s probably like wanting to suppress the projection that a projector projects, without turning off the projector.