I agree with other posters that none of these things are problems if you trust the state and the government - which (from your posts) you clearly do. It does however mean that the discussion is somewhat at cross purposes since sonceone who trusts the state will never be persuaded against ID cards, whereas someone who does not trust the state will never be persuaded in favour of them.
I do not trust the government. My family has suffered extreme negative consequences at the hands of the British government due to the unlawful killing of a relative - who was doing nothing wrong - by an agent of the state. As a result of that, and having attended the inquest and heard evidence from people within the British state, I am deeply suspicious of the state and its machinations. It's a gross simplification to say the debate is between people who trust the government and people who don't.
The history of scandal in the modern British state is not one wrapped up in top-level conspiracy but rather by indifference, cockup, and brushing incompetence and wrongdoing under the carpet. Ask the people who were caught up in the Windrush scandal whether the state should have more ironclad ways of figuring out who is who and which people are lawfully present and which aren't.
I think I would trust the government and its institutions more if I was able to interact with them reliably and be sure they had a proper record of me. I routinely carry ID with me and do not have a problem doing so - because I *don't* trust the state and I *don't* trust the police as much as I'd like to, and if something happens I would like to be able to easily prove who I am. I think Digital ID gives an opportunity to extend this trust to other agencies. This country runs on incompetence and fudge; I find it an irritant and do not consider Digital ID to be some sort of gross overstep. It works in other liberal democracies fine.
I feel that if the photocard driving licence was introduced today some people would find ways to oppose it:
"they could make carrying it mandatory"
"you get a provisional one anyway and they could just make everyone have one even if they'd never passed their test"
"I don't like that it has a photo of me"
"what if 50 million records of adults' personal details got hacked, databases aren't secure"
"why does my address need to be on it by law if it is just a badge to say I can drive"
etc etc etc