The math that isn't mathing is that GDP needs to stop being the number we look at. Goodhart's Law says that "When a measure becomes a target, it ceases to be a good measure." and GDP is no exception. If I pay a cleaner $200 to clean my home, that's $200 into the GDP. If I do it myself, that's not reflected in the GDP. If I buy a robot maid, pay for it once, and it cleans my apartment for me, thats an ongoing quality of life improvement that's not going to be reflected in the GDP. If that $50,000 robot maid frees up 10 hours/week for me to do other stuff, GDP might actually fall instead of rise.