They hire to meet demand. And if AI starts taking jobs, which every CEO is saying AI is exactly doing that, then there will be fewer people with money to buy things and demand will go down.
That's why high interest rates fight inflation. They basically trigger a recession because most businesses need cheap access to loans to get them through the lean months and if interest rates are high they can't borrow so they start firing and that forces people to spend less money, reducing demand.
Now you could make the argument that those CEOs are lying but the reason I think they aren't, at least not entirely, is that public statements from CEOs have real world impact on the stock market and if they just flat out lie about things then they risk in SEC investigation or a lawsuit from activist shareholders.
CEOs might be overstating the impacts but I think it's naive to believe there are no impacts.
Remember a lot of times when they say AI they just mean automation. Every CEO is going top to bottom their entire org looking for places to automate. Like the old joke about, go away or I will replace you with a very small Perl script.
I suspect we are seeing and will continue to see a lot of technological unemployment just because there's a lot of automation going on because AI convinced CEOs to automate things they were previously hesitant to automate.