The problem is, Barmeyoldbat, unless the virus mutated and became less dangerous or a safe, effective vaccine becomes available soon, people will revert to what they were doing before a 17 day lockdown ie going to pubs and clubs, socialising, ignoring guidelines and the 17 day lockdown would have been a waste of effort.
The places with high incidences were locked down anyway, those people who were concerned about themselves and others were careful and, as LauraNorder points out, some areas had few if any cases.
More money should have been given to the NHS and the Forces, who are also able to cope with emergencies, should have been called in as backup.
As soon as the lockdown is lifted, some people will just revert to their previous irresponsible behaviour and it may result in another lockdown at Christmas.