Mark, you have more confidence than me in anything this government does. 
I have confidence in me and my family to do the right thing, the app appears to work (you have to try these things to make a judgement), the government is pretty irrelevant and used as an excuse by to many 
Normally I would agree with you, but there have been some concerns at false positive contacts being reported. My phone won’t run it anyway.
And what is the issue if there was a false contact?
You have to possibly isolate for 14 days for the better good of society?
There is no perfect solution with these things but, we have to do the best we can with what we have...........or face a prolonged issue with an out of control Covid.
I very much doubt we will go into another full lockdown as we cant afford it. Plus the rest of the world hasn't and we need to be aligned to them or businesses will drop like stones
I'm okay with that. I can work from home. But there are so many people who just won't get paid. If you were struggling to pay rent, would you care about the better good of society.
Note that I have no solution, just highlighting why alot of people might not want to put society first.
as an aside, my Brother in Law had a kidney removed in Feb due to it being riddled with cancer. He's not had the all clear, because his scan keeps being cancelled, but he still decided to go back to work with the new term into a residential special needs school, because he needs the money, and the grade and position he has only gets him statuatory sick pay. I offered to pay him not to go, but he reckoned it would be fine. after 4 days he was sent home because there's been a member of staff and 2 kids with it, and they decided his recent medical history put him at risk. Because he's not "sick" they are paying him.