What is actually the definition of “financial freedom”? Having (earned / gained) enough money, so that a person has no need to go to work anymore? If that’s the case, I would expect that number to be much, much lower than 50%.
EDIT: sorry, I just read it in the article. If “financial freedom” just means to work and live more or less without having to worry about financial obligations and what will happen tomorrow, then less than 50% is a rather shocking figure.