Like we've got a ton of truck drivers, who'll surely disappear within a few decades, which is just one at most two generations. In terms of policy planning this is a short-term timeframe.
Same for most people who work in retail, from clothes shops to supermarkets.
But even higher-level jobs will change massively. I highly doubt education will stay as labour-intensive. And I've got family members who are attorneys, and when I speak to them they'll tell me a ton of their workload is simply going through legal documents to look up stuff, and then preparing mostly template legal documents. A lot of this is manual work that'll disappear sooner than you'd think. We've already seen examples in this field with the automated bot that helps void parking tickets.
The amount of people that work high-skilled labour is really small if you ask me. I think a decent first order approximation is to compare the amount of people that work at the Walmart or Amazon headquarters, versus their stores and warehouses. For Amazon I've seen numbers that it's roughly 24k vs 240k, and consider that this is a tech-oriented company that's already automated a lot. For walmart it'd likely be 1:1000. Take a Facebook with 12k employees, a leader in a high-skill industry, and it's the margin of error of the employee count of a leader in a low-skill industry, not in China, but right here in the west, like say Walmart (> 1m employees) or say a franchise like McDonalds. These are also Dutch or Canadian workers.