Philosophy isn't about finding fault. It's about searching for answers. Sure faults may be found, but it's somewhat meaningless without the proposition of - hopefully better - alternatives.
Philosophers help to guide model training so they exhibit certain values, such as being honest and to avoid causing harm. See the Claude constitution[0] for example.
And they can also help with the bigger questions that become more and more important as models become increasingly capable and human-like in behavior. Like if and how sentient a given model might be[1], and as a result how we are ethically obligated to treat/interact with it.
Nobody is getting paid to search for the meaning of life.