It was probably not pushed to 2024 because Paris has already started prepping for those and would not allow Tokyo to push their date. A lot of the facilities w

It was probably not pushed to 2024 because Paris has already started prepping for those and would not allow Tokyo to push their date. A lot of the facilities work is built under the assumption of a particular schedule, at least when it comes to expected longevity and plans for the infrastructure after the games; you can push out some things for a year but people already have plans and schedules for using the space taken up by some of the facilities. Maybe they could have given Tokyo 2032, but it would have represented a huge loss in terms of wasted funds and few of the facilities would be available for the later games. There is also the reputation aspects to consider. The IOC is a rigid, corrupt organization and any disruption or delay that might turn any focus to the IOC itself is not to be tolerated. I am assuming that internally the org is willing to put up with another Montreal or Sochi if it means that the schedule keeps ticking along and the org can hope that people forget the failures in four or eight years.