1) My wife trained as a typesetter on a photo typesetting machine. That was already replacing typesetters working with lead, and the people sorting the used lead, and working with inks etc. They still needed a past-up artist and more. Eventually the GUI based computer arrived, with PageMaker, Quark, Indesign etc. These days she is super productive with a massive online icon library available, full printing and distribution capabilities. Able to do a job that could have involved half a dozen or more people previously.
Are those people unemployed now? Not really (we are talking 1.5 generation now, so not the same people). Unemployment levels are low, and the workforce is significantly larger, with men and women working. The working (outside of the home) part of the population has gone up significantly over a few generations, despite all the new enabling productive tech.
What I see is a lot of visually higher quality work being delivered, but often with the same core content. So productivity has increased, but you get a glossy new shiny report in a PDF, instead of a photocopy of a typewritten page. (Yes, I do simplify. But I think you get the gist.)
2) I started as a system admin, the a systems analyst, worked through project manager, etc. until I was leading startups. In the space where I work now, circular economy and food production, there is so much work to do, that any AI support we can get is welcome. But as the work is innovative, new and not done before, most often the AI tools aren’t that useful, yet. That may change, but with a society that needs to replace a significant part of the infrastructure and processes to achieve a long term sustainable society, I actually don’t worry the AI tools will take my job or any of my colleagues job away. There is plenty to do. I have enough new things in front of me that I could probably keep a whole big venture fund occupied for a long time.