Depends what you mean by automated.

An entry level largely untrained junior doing pro level work because their AR headset and earpiece tells them exactly what to do next? That's possible today.

But nobody wants or pays for "pro level" plumbing work. Just like the majority of construction, speed and minimum viability are king, quality is the last consideration. Especially for plumbing where it all gets covered up. If something leaks in 20 years instead of 40, plumbers don't lose anything. But the plumber who put in extra effort and time does.

Many skilled tradesmen have already left the industry because higher skill levels have little value, and their labor value is just barely above grabbing randos off the street. AI at best is saving a minute of evaluation or google search, but 99.5% of the job is physical work and pain still, not high level problem solving.