It’s simply false that positive sum doesn’t exist the real world. Even the most simplistic trade argument in remedial Econ 101, or even Bio 101 reveals this.
If I'm not mistaken, the whole society is getting wealthier, it's just some people are getting wealthier faster than the others - so it's still a sum-positive.
You only consider those that "make it", there any many who don't because it's getting increasingly harder to be "useful" in the market (ChatGPT is cheaper), innovations usually make it worse. Those "new jobs" are harder and many won't qualify
Did you check the linked charts? The stats show that people are getting wealthier across the board.