This is true. The only way you actually learn something here is by taking ideas as a starting point to identify where they are prevalent in your own life.
Which is fair. These can be good jumping off points. It would be wonderful if Perell credited (for example) the book The Goal for his reference to the Theory of Constraints, etc.
Yeah -- I think him and those like him (Tiago Forte, etc) would argue that they have "remixed" the idea enough to call it their own... which is highly debatable IMO.