Also, new professions and jobs can be created. Allegedly, many of the actual children will work in professions which don't even exist today.
Professions which didn't exist 30 years ago: Web-developer, blogger, blockchain programmer, mobile phone vendor, computer mechanic, full-time Youtuber... Also shared services centers were small and local. Writers, journalists, translators used mostly typewriters.
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But, yes, if the AI gains terrain too quickly, it can cause temporal surge in unemployment and heavy social-poitical tensions. One solution is universal, unconditional basic income:
https://en.wikipedia.org/wiki/Basic_income