IMHO, the Buddhist recommendation to exercise this type of necessary skepticism is to try it out, to experience it. If your experience confirms what the received wisdom is said to be, you are probably on the right track. Of course, there are lots of other basics, including the most basic of all - get a good teacher. Needless to say, the meaning of "good" in this respect always requires a modicum of circumspection. :)
Yup, there's lots of stuff like those you mentioned to divert your attention. The idea is to give you a reason to get started. In this case I'd say something like Nike's Just Do It as mentioned in some of the other threads is a tad overconfident. The Buddhist way would more likely be Life is Short. Just Get Started.