I say this as not a 'car-gal' (ugh), but I think the bit about the 57¢ cost of the part might have been incomplete. If you have to dismantle and rebuild an entire section of the engine in order to replace a defective part, that the defective part is cheap is beside the point. Plus, I'd wonder if doing so would be the cause of other problems popping up in the life of the car. Again, I stress that I don't actually know what-all's involved in the particulars of this recall; I'm perfectly happy to heap scorn on the GM bean-counters.
And yeah, they totally brought in Mom so she could clean up the mess all the boys made. Because you know wimminfolk just love to clean, amirite?