You’re right. Given enough time, freewill goodness can do the job. It is why the West is so near to being like Heaven on Earth, just on this side of eternity.
But liberals want more. They need society enslaved to goodness. God is willing to sacrifice the world to refute Satanism in this point.
Given enough time?! And you think the West is close to Heaven on Earth?! I don't know whether to laugh, cry, or rage at you, but I do know you are utterly, utterly wrong.
Problem is that what liberals want to mandate is not goodness. They want to mandate and force us to accept and participate in evil.