"Theft of trade secrets" is how Silicon Valley was built. Fairchild was "theft of trade secrets" from Shockley; Intel was "theft of trade secrets" from Fairchild. When Camenzind left Signetics and designed the 555 (under contract to Signetics), he was "using trade secrets" of Signetics; in today's legal environment, they could have just ordered him to stick around as an employee and work on a less risky project. MOST…
There's an element of truth in what you are saying. But in this case Lewendowski didn't build the stolen technology. He misappropriated the work of other engineers at Google. It would be one thing if he just left with his own work. That would be more understandable.
(Edited to clarify and correct spelling.)