If you watched the video, the preacher was exhorting, and encouraging.
As for the World, it's doomed and will not be fixed. No need to be concerned about the World, it gets melted into a big ball of red glowing goo. Global warming at it's finest.
There is a big difference in gaining tons of knowledge with no power, than to gain to know the Lord personally, hearing his voice, and doing what He say do. Many are in for a big surprise, who think they are doing just fine with their powerless religion. Nobody leaves a person they know and love, many go away from religion as it never satisfied anything in their life, the Person though never fails.
You find many who say I left Christianity, I left the faith. They mean the system they were taught of mans idea's. You hear it in their speech, then never knew the Lord, never demonstrated to that He is there, and real.
I have yet to find one in many years saying, I left the Lord Jesus Christ, we just did not get along.
Mike.