They aren't saying that they don't know what to do with the AI productivity boost, but rather they think it worth taking a huge productivity hit right now so they can invest in the future. Whether their vision of the future is realistic...
Execution of unrelated ideas seems like a natural follow on, and having managed several such "labs" efforts, it's actually a good idea but it inevitably grinds up against the lack of will to continue investing in the face of headwinds, especially since the main business line is several orders of magnitude larger than anything labs can deliver in a foreseeable timeframe.
https://www.businessinsider.com/ai-isnt-killing-software-cod...
The only way I can rationalize that so many people refuse to believe this is happening is that they are on the seller side and not the buyer side of engineering labor. This means they have blind sides to the buyers view of the market (some sort of information asymmetry), and secondly they exhibit cognitive dissonance to protect their self-esteem as a seller.