Where as God can do whatever he wants, knowing infinitely than humans and what is in their best interests(written in the rest of the bible that you didn't quote). We humans think we can do it on our own (simple pride) but we can't. We have embedded in our counscience the blueprint of our need for God and our sin nature. It is inside and we know it. Some obey their conscience and seek God others follow after self, or some man made "religion" that keeps them bound for life, and with the same gaping whole in their lives as before they found "religion".