I think the idea of using these big sporting events to upgrade or build new facilities is a good one, however the current practice where the host nation/city sits on most/all the expenses and the organizer/owner of the event reeps the profit is completely turned on it’s head.

There is enough money involved in these events amd organizations that they should foot more of (maybe most of) the bill to build the facilities and infrastructure, and the host covers some aspects as well as providing the permits and location itself.

Furthermore, some events such the Olympics have such ridiculous demands that cities/nations should start telling them to fuck off imo. One of the more obvious ones being the demand that IOC leaders require a direct private road accessible by limo between their hotel and the venues