In short...

If they choose to die... or walk a death path... let them.

Every slum on plant earth used to be a lush green field... then people occurred... then garbage heeps...

It is not natural... in nature... for mass decay to be summarily encouraged/fertilized and grown...

What harvest is there to reap?

If you are not actively engaging EVERY enemy you encounter... you are allowing another to fight for you... and that is cowardice... plain and simple.