Edit: Let me state it a different way that might shed more light on my point. A CS major can pass all of his/her classes with a perfect GPA and still be incapable of writing software ready for a production system (even at small scale).
The STEM degrees emphasize fundamentals that are rarely (if ever) used in day-to-day "real jobs".
Sure
> and what it means to live a good life
That's just self-aggrandizing bullshit. There is no class that will tell you what it means to live a good life. Anyone who thinks so is dearly lacking perspective.
>an exclusive focus on STEM is indeed 'super specialized'.
An exclusive focus on STEM will include the philosophy of science and what it means to seek truths about the physical world. IMO that has immensely more value in a philosophical sense than you seem to imply.
STEM at best tells you how to do something, but can never tell you what to do, or why to do it. For that you need philosophy, much more than philosophy of science.