When he raised the issue to managers that he wasn’t working on anything related to his specialization (deep learning for NLP) and this made him unhappy, the response was essentially, “Get in line.” I’ve heard similar stories about Google from a former boss who had been a long time manager in Google.
You essentially get paid super well to be put out to pasture so that your skill isn’t being used by other companies (leading to more demand for Google’s managed AI solutions).
In order to get career-developing work, you have to play political games or get hired in a non-standard way, like acqui-hire or poached, where you can negotiate your projects as part of your hiring conditions. Eventhen it will probably only be respected for a short time while it’s convenient for Google, and they’ll find a way to manage you out of that situation when they want to.
There are some tremendously talented AI engineers in places like Google. Some of them create awesome products and tools. A bunch of others sit around and atrophy working on dumb shit locked in golden handcuffs just to ensure they’re not on the market and able to help a company build things in-house more cheaply / more optimally than if they needed to buy it through some managed services through Google.