The public is not hot on civil liberties. Or rather they are not at all hot on thinking about the issues, the links between proposals, their immediate impact on others, and later impact on themselves further down the line.
As a concept yes, ask them a poll 'do you believe in civil liberties' and people will say yes. But expect them to make the connection between having a test and trace app, or a vaccination passport, and the impact those measures might have on society at large, rather than themselves personally, and there is generally an immediate fail. "I've had my jab, so if someone else 'can't be bothered' then it's their problem, innit. Then next month a different jab comes along, which they legitimately can't have, or can't get, or the new version of the app requires them to spend a fortune on a new smartphone - all of a sudden "this is a ridiculous imposition", "it's outrageous", "this is so unfair", "why are they picking on me", "I didn't think this would happen".
Lets bring it closer to home.
Few people outside this forum would object to a ban on photography at railway stations, or it being allowed but only with advance application, authorisation and monitoring. Yeah it's just a few anoraks getting worked up, "they get in the way anyway", "the railway is safer to operate without them". Now extend that small ban to one forbidding photography at other public places (parks, wildlife sites, museums) and DING "Oh yeah, now I can't take a photo of my kids eating ice cream at the playground, I can see what they were on about".
Think about the impact on others now. Because one day it will be your turn to be picked on.