Nobody can alter fate. Cause & effect starts at birth and is metaphorically chained to the present outcome.
> Or are you advocating for lesser sentences for all crime in general?
One thing I'm certain on. The justice system shouldn't label a person a criminal after the rehabilitation. Typically, I think crime needs to be thought of like catching the flu. The outcome is more severe than the flu but the process for treatment should be similar ideology. We have someone that ended up in a bad situation without fault and even though people are socially conditioned to think otherwise. That's something I believe should be changed as well. People should be educated of how they didn't have "real" control over the outcome of their life. Although I think the average person finds it hard to grasp at first.
You mention undiagnosed brain defect and there has been a case where a tumour resulted in a married man having sexual feelings for an underage girl. The feelings were gone once the tumour was removed. The feelings did come back though but same as the tumour and in the same exact spot on the brain. Thought you might find that interesting if you haven't read about it.