It isn't, because it isn't private life when it is managed by government. The spirit of Article 8 is to not mess with private life, not to place no limits on it

It isn't, because it isn't private life when it is managed by government. The spirit of Article 8 is to not mess with private life, not to place no limits on it. Specifically, it is a time bound on private life and private time which is not disallowed. This is a restriction "in accordance with law". The restriction is not unreasonable nor hard to comply with.