The EU Court ruled that “Backdoors may also be exploited by criminal networks and would seriously compromise the security of all users’ electronic communications. The Court takes note of the dangers of restricting encryption described by many experts in the field.” Any requirement to build in backdoors to encryption protocols for law enforcement agencies could also be taken advantage of by malicious actors.
The EU Court of Human Rights’ also builds on their acknowledgment that “mass surveillance does not appear to have contributed to the prevention of terrorist attacks, contrary to earlier assertions made by senior intelligence officials.”
Some social progress such as death penalty abolition or gay marriage often pass with short majorities, and constitutional changes usually require exceptionally large majorities.
Then that’l require more fighting. I however doubt that the constitution of most countries place huge blocks on giving people more freedom.