How will Bezos' spaceflight and Musk's rockets benefit the rest of humanity? Here you go:

https://medium.com/predict/why-bezos-going-into-space-is-a-good-thing-and-legions-of-naysayers-wont-change-that-2ad5c4b36427

You can criticize Bezos for his treatment of workers or advocate for him paying more taxes. Those are fair criticisms. However, disparaging his other achievements? Amazon Web Services power Medium. Without them, you wouldn't be able to write on this platform and make money doing it. And on the space thing. What guys like Bezos and Musk are doing is going to make access to orbit much cheaper. This will result in all kinds of other innovations, which will benefit the rest of humanity. There are already several spinoff companies that are developing products because of this.