The first wave of the Spanish flu in 1918 killed 3 to 5 million. The second wave killed 20 to 50 million.
If those who are "ready to take their chances" mingle together and with their friends and family and neighbours and fellow shoppers too soon, become infected with the coronavirus, and each hand it on to several others, they will contribute to spreading it wide just as the second wave of the 1918 virus spread - a multiplication of ten times the first wave that we have just experienced.
All the effort that has been taken to slow the spread and flatten the curve, will have been wasted, and we will get the same effect as if we had just not bothered to take any precautions and just left it to rampage straightand man ICU beds and equipment, care for and treat the worst patients, or prioritise the manning of essential services. We'll just need to dig lots of mass graves ready to fork-lift the bodies into, including those who starve without suppplies getting to them.