What Andrei is getting at is that there are so many things in our lives that we can be positive about and appreciate, laugh at and enjoy - just as they are. If we can seize hold of those opportunities, then we will have much more happiness in our lives that we might otherwise have thought possible.
Of course you are right - there are many negative things in our lives that we can't control. But is that the sum total of who we are and what life holds for us? No. Or rather, that will happen only if we allow the bad things to overwhelm everything else.
Andrei has discovered that he doesn't have to do that. He's empowering himself and making choices that are good for him, even when that seems dangerous and difficult, and even when all seems lost and hopeless. He's telling you that you can do the same.
Nobody living can ever stop me
As I go walking my freedom highway.
Nobody living can make me turn back:
This land was made for you and me. (Woody Guthrie)