Leaving the use of resources out of it I think in this case its about China and its agenda to achieve world recognition and this of course is political and as you say saddening just as the 1936 Olympics were in Germany
You only have to look at the hordes of "world leaders" minority groups every one, all there on there nationalistic jollies attempting to gain a few brownie points on the backs of Athletes instead of getting on with the jobs they are paid to do .