More and more, places that bid for Olympics, World Cup, etc, are generally oppressive dictatorships that seek to host event as publicity stunt. IOC and similar bodies give very strong preference to organizers willing to build flashy and expensive new venues, instead of giving preference to organizers that can reuse existing venues. Many of those purpose built "gems of architecture" will be useless pieces of concrete and abandoned after being in the spotlight for few short weeks. It's no small wonder that increasingly only shady dictators are willing to provide what IOC seeks for. Because for everybody else, there's little to no incentive to pour money into something like that.