almost by definition, using tech to replace workers in other industries will reduce the total amount of workers needed for that job

The data on this is actually uncertain. Installing ATM machines to replace bank tellers should have been a slam dunk, but didn't really cut into bank teller total employment.

https://www.aei.org/economics/what-atms-bank-tellers-rise-robots-and-jobs/

Don't get me wrong, the ATM was the first step in a long chain of improvements that still ought to soon make bank tellers obsolete, and the dept of labor predicts 15% lower demand next year.

But even this relatively one-for-one swap of machines for people has taken half a century, so far.