It's a way of getting the economy restarted, whilst mitigating some of the risk.
We cannot continue to have pubs / restaurants and shops closed indefinitely.
I went to the Pack Horse in Mellor on Sunday for a meal. Was impressed by the cleanliness, space for social distancing, hand santisers every where, one way system, table service only.
They've really made an effort to ensure the place was safe. Of course, you can't wear face masks in a pub / restaurant, but it's about reducing risk.