I don't believe you

I also have a hunch that if it's others helping you, you see a lot more value in their effort, than if the roles were reversed.

Also, even just a quick look at your post history. You've put smiles on people's faces. What will they do with that? It can be a difference of how they treat the next person, the difference in mood to stop for someone who looks like they need help. A renewed hope for the good in humanity. It's so much, and I'm way too wasted and tired to go into this much further.

Maybe you've contributed 81.9% to a person turning to compassion instead of sociopathy with a single action.

Maybe by "so imperceptible as to be invisible" that's kinda what you meant, and I pissed you off now. Shit happens, friend :)