@BeatsMeWhy,
As any other activity, Philosophy is bound to be a survival trait. Not even from the point of view of the species, but from every individual's.
I personally wouldn't call Philosophy anything you use to confound other people or to get advantage over them (at least, knowing that in very simple systems cooperation improves every individual's probability of survival, and that so far there is no proof that any living creature will do nothing it can calculate as a bad thing for itself, not even to defend its descendants).
I wouldn't call Philosophy a cultural option to be regarded as a philosopher, let alone an apparently useless way of spending our limited lifetime.
I would call Philosophy the way to:
1.- Understand cooperation as a profitable attitude.
2.- Learn how to cooperate.
I know many people will disagree. And I'll sincerely thank any remark or correction.
I don't know if someone will agree, but in case someone does, I'd really love to know.
Regards,
S.