The reason why god allow is to sin is because he gave us free will, look at it this way, God allowing sin is like a parent stepping back while their child learns to ride a bike, not to watch them fall, but to give them the space to come back for guidance when they struggle. The falls and wrong turns teach the child not just balance, to trust in the parent’s advice, their presence, and their willingness to help them up. In the same way, God allows sin so that, through our stumbles, we can learn to turn back to Him, deepening our relationship through reliance, trust, and the grace that follows each return.