I agree that context changes the effectiveness of the advice.
My disapproval stems from the watering down of advice to blanket generalities. Vague enough that everyone might glean something from it, but the lack of specifics can turn it into a casual, flippant throw-away of words in times where more purposeful advice serves better.
A friend recently shared an image of Lincoln with the quote, "Better to remain silent and be thought a fool than speak and remove all doubt."
Correcting that idea, I replied with the following: "Speak! Reveal your foolishness, and open yourself so that others may enlighten you and you can learn. Fear the false mantle of silence-as-wisdom; better to briefly be the vocal fool than forever the silent fool."
The experience led me to thinking that it might be fun, cathartic, andor a good mental exercise/reminder to translate our culture's more irrational memes into a more presentable package.
Post your own examples if you like, and if I think of/see more I'll post here.