The problem is that the "advice" might do more harm than good, even though good was intended. Skin care is a prime example of this; people recommend what works

The problem is that the "advice" might do more harm than good, even though good was intended. Skin care is a prime example of this; people recommend what works for them, but these products will, de facto, not work for some. This is something that goes against a lot of HN's start-up philosophy, so it might meet some more disagreement. A lot of the advice dispensed on HN are maxims - take them or leave them - and the same thing applies.