Why should I join the war?(我为什么要加入这场战争？）

I walk so long way, to find the answer. Or, a change.
To be precise, a Salvation.
In the road, I have saw many interesting thing, make many friends.
But, more of a sad, painful and despair.
I always ask myself: Is it really worth it?
Is it really worth it to give everything for an illusory purpose?
I don’t know.
In my personal opinion, this behavior is ridiculous.