Why atheism always has a burden of proof

[Doubting Thomas]

The sickness is sin and what you see people get up to with all these various addictions, compulsions, obsessions and all their flaws and failings demonstrate this point as a reality. Don't think this stuff was all "made up" it's human life in reality for real.

So that's the sickness, but here is the cure!

This sounds a lot like preaching to me.