Is it true that succeeding in a secular career that offers power and prestige leads to lasting happiness? No.
Playing devils advocate a bit here...when I read that question with my "weasel word" filter on and engaging "pretzel logic" they are correct. First one needs to focus less on the word career, and more on offers. By using the word offers the implication is that one has succeeded in a career strictly and only because it offered power and prestige, with those two things being the persons sole motivating reasons for their career choice.
By linking their choice of words in the manner they did it promotes the idea that ANY success, in ANY career choice is solely for selfish, power hungry look at me reasons. And power and prestige do not automatically translate into happiness.
Think of the difference there would have been in the answer had the WTB&T$ been intellectually honest in how they wrote the question. "Is it true that succeeding in a secular career that offers personal satisfaction for a job well done and is something you truly enjoy working at leads to happiness? The answer would likely be a resounding YES!