Brownie, I don't think there is much "convincing" to be accomplished here. It's a non-objective sculpture that appropriates the environment. I prefer representational sculpture, but sculpture has expanded its vocabulary considerably since the Old Masters. Christo's bag, fwiw, is original. Maybe someone else could expand on the deeper meaning, but I got the impression Christo is merely playing with the environment to change it in some fun way.
There is a documentary about the project Christo did in Northern California that is entertaining. Christo and his wife had to jump through all sorts of hoops to get all the landowners to agree, and the documentary featured many interviews with residents on their opinions of what Christo was doing. Some were very negative, and they expressed displeasure with these usurper artsy fartsy city folk. Christo employed residents to build the project, which changed opinions some. He also interacted with them during his stay and was friendly toward them, eventually winning many over.
Christo's design in Northern California was a tall, fence-like, white canvas object supported by posts that ran for miles perpendicular to the shore before disappearing into the ocean. Caught in the sun and reflecting colors, I thought it was cool--and once the project was complete many residents agreed.