How big a boom in blue collar work is realistic, and how sustainable would it be?

We've all heard the headlines. The blue collar job market is projected to strengthen significantly which, when you're predicting a construction boom, is easy to wrap your head around.

In my mind there are two significant constraints to sustainable blue collar job market growth. One is that construction moves much slower, and is subject to more regulation and local policy scrutiny than other businesses. The other is that much of blue collar work is project based, meaning that work could dry up fairly quick. Lastly, while much the projected strength of the blue collar job market is based on needing humans on site, I would assume that the trades may still be impacted by AI in the form of deskilling, or lowering the necessary experience or expertise, which could significantly broaden the qualified workforce.

So when we hear that the blue collar job market will be strong, are we only getting half the headline? Could it be strong at the peak, and then be expected to plateau or retrace?