The point of the prodigal son parable is definitely less clear to most people. To one person, it might be something about the role of love in forgiveness. To another, it might be about helping others without moral judgement. To still others, it might be a story about how god will welcome sinners and put them at the same level as people who have always been righteous, so we're not building up some sort of equity on a day to day basis. But on the flipside, the parable probably appeals to people who feel guilty about how they've lived their life and feel like a lost cause.
There is no one answer. You paint in your own wishes for what it might mean. That's the essence of religion, and why it's an entertaining parable we can talk about forever rather than just a clear statement of the point.