It's likely the area could also be used for new housing projects after the event. I do agree that it seems ridiculous to move the cultural landmark as it also displaces local restaurants and businesses.
The restaurants are in the outer market, which is not going anywhere. Only the inner/wholesale market, which was largely off limits to tourists, is moving.
I read it'd be a bus hub for the Olympics, but I would bet money that it too will be razed right after the games to accommodate the more prevalent need of housing or business development.