That might be the case for other disciplines, but it certainly isn't for philosophy. There are no special techniques, you just read what other people have said on the subject. What else is there?
Philosophy has one of the highest average incomes of degrees, because of the number of graduates that go into law and business.
> Philosophy has one of the highest average incomes of degrees, because of the number of graduates that go into law and business.
And why do they need those degrees in order to do that? What are they employed to do?
This isn’t some fringe thing. Play around with some Google searches like “what can you do with a philosophy degree?”, “best pre-law degrees”, “philosophy and law school” and you will see what else one could possibly do with a degree in philosophy.