Yeah I don't know about the math. I've seen numbers that differ significantly from yours, but none which make it profitable at a reasonable price. I am sure he will continue to drop launch costs and I assume satellite improvements will make them able to serve more people, maybe orbit longer as they get smaller.
Complete nonsense. They didn't start in 2015 and didn't get investment into Starlink from Google because hopefully some presidnet would want Goldon Dome in the future. Starlink is a good business and has plenty of military value without Goldon Dome.
Or maybe it'll just implode. I hope not.