Science and statistics
We know that the virus spreads from person to person most virulently in close contact indoors. So we limit social contact. The way in which we exit from lockdown is important and is going to be gradual. So it has to be done in steps. As you say transmission in pubs/restaurants may be less or greater than in "non essential shops", I haven't seen the figures I presume that the Government and advisors have? But, that is not the only factor there is the economic factor. So restrictions will be eased (and potentially reversed) in steps.
Try to ease up on the paranoia.
It feels very strange for me to be defending the government but every other attempt to ease restrictions has been botched, let's help them get this one right.