I understand what you're saying, and you are correct: a lot of jobs that exist today will become a thing of the past in the next 10 - 20 years. I like to look at things positively, maybe further down the road...
In every revolutionary step our society took (making fire, the wheel, agriculture, aqueducts, books, press, industrial revolution, electricity, cars, mainframes, personal computers, internet, ...) the result was that there was a strong demand for what the revolution could provide. There were always enough new jobs available to meet that demand, and our quality of life improved significantly overall.
I still think that the demand is there: we need more access to health care, we need easier ways of applying knowledge and information to our lives, we still would like to move from place a to place b a lot more, we need to improve education, we need better ways of connecting with people we love, etc.
Looking positively, I expect that AI / LLMs / ML / etc will enable the next jump in quality of life for everyone. The benefits will be unevenly distributed, but I still expect everyone to benefit from it.