Explicitly trying to re-identify data that has been de-identified is typically a fireable offence at FAANG.

Accidentally making a machine learning system that happens to (potentially) do it is a different matter.

Modern corporations have learned that the best way to do shady things is to make it very clear that such things are against policy and absolutely forbidden, and then to also make it very clear that breaking policy is the only way to actually get your job done. That way they still get all the benefits of doing shady stuff, and if it ever comes to light then they can fire some scapegoats and explain that this was against policy and they'd never ever condone it.