"Cannot" doesn't apply. "Chooses not" does. God honors their choice. When people determinedly choose self-will rather than repentance, He lets them do so.
Not true, you are judging God from flawed sinful nature. Just because you would be perfectly okay for your kids to do what they want and suffer the consequences (bet you are not) Does not mean in any way shape or form that our LOVING FATHER would or even could do the same.
Adam and Eve had no concept of sin, no more so than a toddler being told that if they touched the cookies on the coffee table, then they could kiss college good bye.
It might be argued that the toddler might spend years earning forgiveness and the parent might relent, but this is apples and oranges. Adam and Eve had SATAN almost one on one driving them further and further from God. Did they have Scriptures to guide them; preachers whom they could ask? Of course not. What were they to do? They knew no better.
Do not miss the obvious, the real lesson here is for us today. Jesus said for ‘us’ to be perfect as God himself is.
Perfect is perfection; it is not leaving loose ends (billions burning in some fanciful fire to glee of pharisee like Christians. Jesus called such as these: Snakes and Vipers and children of Satan.
If you were perfect, you would see even in the most evil of humans a lost and misguided child. You would also see that they were deaf and blind, having no chance to ever find their way home even if they knew they had one. You see perfection is not a title, it is action. Yes, Faith with out works is dead just as Love without Loving actions is dead.
If we as children of God do not look at these same reprobates through the same Love filled eyes then where is the love? Where is God?