I mean Tokyo 2020 lack of spectators was just a casualty of the pandemic, no OOC is stupid enough to purposely build an stadium to not have spectators in it. And in 2nd place, the infrastructure built for the 2020 olympics wasn't just planned for the 2 weeks, it's purpose was redeveloping the already aged japan sporting infrastructure. The old stadium, while iconic, was already old so the olympics were more like an excuse, than a purpose for building a new one.