Interesting to read all the responses in this thread observing incidental correlations between intellectual or practical accomplishments and philosophy. Famous scientists are sometimes interested in philosophy, philosophy majors score high on the GRE, etc.

It does not follow at all that studying philosophy helped cause those accomplishments.

The situation is similar to brain training games like Lumosity. They do not make you smarter in general, just better at that particular game. People who are already smart will do better.

Personally, my argument for philosophy is that I enjoy it.