The thinking skills acquired from studying philosophy are definitely useful when applied to other areas, but its not useful if studied on its own - if "useful" is defined as something which promotes tangible accomplishments in the world. While it can be beneficial to the development of a person, it will not lead to actual advancements without the help of another science. I agree with Tyson on this: extremely bright people should prioritize their study to sciences like physics, chemistry, engineering, biology, etc. rather than philosophy, as those sciences that can utilize their potential for actual tangible benefits. A student shouldn't devote their studies to philosophy, although it could be a good supplement to some other field of study.