It is interesting that these safety standards remain non-binding. No EU state is able to grant them the status of a legal regulation, law or similar. Compliance is not obligatory. Anyone can look to meet the requirements of the EU directives in a way other than that described in these standards.
However, it's worthwhile remembering that each manufacturer must provide proof that his products comply with the directives. If he can prove that he has complied with the relevant harmonised European standards, it is assumed that the product will also meet the requirements of the respective EU directives.
In other words: The simplest way to meet the EU directives is to comply with the associated harmonised European standards.