since this entire topic seems philosophical, I'll go down this path --

someone is sitting at home, feeling worthless, like their life is pointless and they could disappear without anyone noticing.

but there's this tree everyone likes. people notice this tree. because you see lots of pictures of it, people must visit it often. it's a confluence.

if you were to, say, scratch your name into the bark, people would notice. you would have made some difference on the world, for better or worse.

if you were to cut a branch down, people would DEFINITELY notice. people would think about you, when no one would before. even if the thoughts aren't positive.

in other words, to not feel so small and meaningless.