How many people can fly this versus normal airplanes if we talk about same distance but different size, speed, and amount of people? I mean, the SR-71 was decom

How many people can fly this versus normal airplanes if we talk about same distance but different size, speed, and amount of people? I mean, the SR-71 was decommissioned because it was too inefficient regarding fuel cost, and it became obsolete due to high quality cameras in satellites. Why can these people residing in Japan and New York not use the alternative we are all able to use: AR plus video conferencing. What is so important that people need to fly at Mach 9? I can only imagine its Putin running away from ICC.