Why is Kant's practical reason for God wrong?

[Esquilax]

Seeing this world unattainable by humans alone, he introduces the existence of God, a being that portions out happiness to those who are morally right. He claims that this type of reasoning is practical because if there were no God, there would be no reason to be good because it would never bring happiness. He thinks that we have infinite amount of time to achieve perfect virtuosity so that we can deserve the ultimate happiness. Therefore, he also has a practical reasoning for immortality of the soul.

There's the problem!



So Kant can't figure out how humans could do something, so he introduces magic in order to fix that gap in his understanding. Unfortunately, in the real world, one can't think so hard that their handwaving becomes literally true, and similarly, one isn't endowed with this right to know everything; his inability to figure it out doesn't therefore mean that what he feels is the best explanation available to him currently must be the right one.

On this score, Kant needed to just admit he didn't know, and leave it at that.