(I'm going to ignore your presumption that information can somehow be "stolen" in any meaningful sense, but you really ought to explore that notion further.)
For your first two examples (my medical records and tax records), that is personal information which is limited utility to others. By contrast, the state "secrets" here directly impact the day-to-day lives of thousands if not millions.
Your third example is exactly something that would be beneficial to know--any enemy presumably already knows about it, and keeping it secret from the public at large only serves to allow the people who should be working on it to function without oversight.
As for the actual information being leaked: that is not personal information; a good chunk of it is operations details for state security apparatus, and that's exactly something that I, a citizen, would prefer to know about.
With such great resources at its disposal and so much power at its beck and call, we simply cannot afford to allow the government any secrecy or opacity in its functioning. To do otherwise is to encourage the sorts of corruption and corrosion that turn a state into a horrendous place to live.
There is a reason we have a public interest defence - the Guardian believes that it is in the public interest that these documents and their implications are made public, discussed and changes made to our security services.
I agree, but I see why others do not - but I ask you, how would we have the debate without the leaks and without the defence? If there is a way, please tell me.
I trust my government to do the right thing. I don't think we have an awful problem in the UK with corrupt greedy government abusing its power in the main.
No shit. Well, I'm for one glad the UK hasn't had any problem with, you know, extraordinary rendition, torture, extrajudicial executions during the Troubles, warrantless surveillance of political opponents during the Thatcher era. And I'm sure Tony Blair was telling the truth, and nothing but the truth, about these weapons of mass destruction.
> Yes I have moral reasoning. It's stolen information.
Well, you're free to believe that the right not to have one's information copied trumps any other concern. How are you feeling about your information being illegally copied by your own government, and freely shared with other security apparatuses?
Maybe your last few tax returns. May as well publish those as well!
How about state secrets on any weak parts of military defences?
Yes I have moral reasoning. It's stolen information.