You're right to say RoboCop. It's a masterpiece of cinema.
What makes a man a man? What makes a human a human? When has society used us up? When have we sacrificed everything for nothing, and come to the realization in front of a house where we are no longer welcome? When can a sacrifice bigger than one's self close the final chapter on a life lived in naive folly?
If someone doesn't come away from watching RoboCop feeling nearly every feel, they missed the point.