I don't under-estimate the changes at all. BUt there was a long time before we made any changes.
We had the virus here for over two months before anyone made any changes other than a week or two's hand washing in mid March prior to lockdown.
No one has yet give an inkling to how an R=4 ish virus has free rein in a population for up 10 weeks and hasn't infected more people, and that's before we get to add those that have caught it since lockdown.