> strictly necessary in order for the provider of an information society service explicitly requested by the subscriber or user to provide the service.
One very ignored qualifier here is "information society service". This is defined in Directive 2015/1535 and one of the requirements is that the service is "normally provided for remuneration". That is usually understood to mean that the service needs to be tied to provider's economic activity. This effectively excludes, for example, public authorities websites which are for their own public duties. It does however include e.g. ad supported websites.
And yes, I'm aware that many national implementations actually miss that qualifier. That can save the non-commercial private sector websites, but public authorities do not benefit from Member States failing to transpose Directive correctly.