At university I asked a physics professor if it would be physically possible to build a mega structure like an orbital ring or space elevator. The professor told me it wasn’t a physics problem it was an engineering problem.

I can tell an engineer that they are not a scientist when they tell me they don’t yet know how to solve the engineering problems of building a space elevator. While true the engineering problem is still unsolved.

There are some editorials in the article that are unprovable like statements about morality. But some of these problems are really hard, and until some major breakthrough happens they will stay that way.