On the beach, nobody cares about it. In a sandcastle, it's expected to keep still and hold its place. In a gear-box, it's destructive and must be flushed out.
For me, it's what we're born with (no one is born a bully/racist); original sin is just an expression of a potential bad life...
Your personal take is not a consensus. However, I do agree with you that every healthy infant is potentially a fine, upstanding, productive citizen - as well as a potential criminal, maniac or screw-up. But in all that potential, there are already present some inherited traits, tendencies, advantages and disadvantages, capabilities and temperament. If a child is raised with close attention to his particular nature - encouraging the positive aspects of his personality while correcting and teaching him to control the negative (feeding the good wolf), he should be able to reach his best potential, both personally and socially. But if they're treated like mass-produced items, some children will be damaged beyond repair.
Original sin is a concept that arises from the recognition of human autonomy: we can choose to disobey - which is a very bad thing to do in a rigid patriarchy.