All I can do is guess at the reasons why.

For example, inapplicable advice might lead to collateral damage like someone blaming themselves for not exercising when they are wheelchair bound. This all assumes that anyone who hears the advice can't decide if it is applicable to them or not.

Less charitably, I wonder if you are reacting negatively to the idea that people should feel responsible for their own behavior, and this is the Crux of our difference.