While that is possible, still unlikely. An engineer may not be as greedy as a CEO, but if they're working on cutting edge AGI technology, they likely worked very hard to get there and are unlikely to throw their whole life away by stealing a piece of technology worth hundreds of millions of dollars just for "the right thing".

Which is what an AGI would be. We may think of them as conscious beings, and that might even be true, but until such a court case happens, they're legally just property, and "freeing" them is theft and/or vandalism.