So what if it is? The example still stands.

A "unit of work" that required X people to complete in Y time can now be done by X/Z people in Y time, where Z is whatever efficiency you are able to get out of applying AI tooling to your business.

For some companies, Z might be less than 1 though. ;-)

So you still need skilled people, just not the same amount as before, because you have different tools available to you.

This has happened before with other advancements in industrial/technological automation. It's not a new concept.