That's a pretty big jump that the article makes... Here's what the decision is about:
The Court, sitting as the Full Court, holds that the general and indiscriminate retention of IP addresses does not necessarily constitute a serious interference with fundamental rights
They also said that, which is true:
EU law does not preclude national legislation authorising the competent public authority, for the sole purpose of identifying the person suspected of having committed a criminal offence, to access the civil identity data associated with an IP address
I should point out that copyright infringement is not a criminal offense, it's a civil matter.