I do think more of us have already had Covid than we realise. I'm pretty sure I have but without a test I can't know for sure.
I am concerned about the OCD aspect of this. When people over-clean it's often a way of protecting their family (often gets embedded after a trauma which involves a threat to family). This is now going to be wide-scale, yes the virus is incredibly infectious but we can never be 100% sure about any food packaging we bring into our homes, including from the supermarket.
However, if we avoid people actively coughing and sneezing, if we wash our hands after touching external surfaces, it is highly unlikely we would pick up the virus. The warnings are often exaggerated to get into the thick brains of those who think it doesnt apply to them. Sensible people do not need to over-clean, as this could lead to more anxiety down the road.