I’m not suggesting you can’t add value, but that it grows asymptoticly towards a limit.

Human ingenuity is scarce and even if it wasn’t, I’m allowing for some things to be not scarce in practice, like information and maybe energy someday.

But concrete / metals / something physical will be scarce, and as long as it is, the rest of the economy cannot tend towards infinity. Otherwise, in the far enough future, this scarce thing would be essentially free.