With social distancing there are less tills open, and less checkout girls to checkout. If you suffer from low mood then the checkout girl chatting to you and smiling can really brighten your day. Not forgetting the other staff.
There is a serious point here - online shopping is all very well but people need social contact.
You really think that some attractive woman wants to chat and force a smile to boring old farts who hang about the check out to leering at them?