Honestly, didn't read the article, it was a bit too long, but to further your argument, a Dyson sphere doesn't have to be a solid sphere encapsulating the star. One can theoretically put a swarm/lattice of 'dyson satellites' in orbit around the sun to achieve the same effect. What holds back the concept of a Dyson sphere as a valid energy source is not our satellite building tech or mining abilities, but that we don't yet know how to transmit this energy that's generated in Space onto Earth without frying it.