Privacy is often discussed as though it is a special request made by people with something to hide. I see it as a normal condition of being human.
Private conversations allow people to think, question, disagree, recover and ask for help without every unfinished thought becoming permanent evidence.
Systems that inspect everybody by default reverse the burden of trust. Instead of investigating a reason for suspicion, they treat private life itself as suspicious activity.
Safety matters. Abuse, exploitation and credible threats require effective responses. Targeted investigation and permanent population-wide surveillance are not the same policy.
A right that survives only while it is convenient for authority is not much of a right.
Technology should make legitimate investigation more capable while keeping ordinary private communication private. That balance is harder than scanning everything. Difficulty is not an excuse for abandoning the principle.