Right now you're probably thinking "oh but the experts are saying this it must be true". But what if it's not? The one thing about this virus is experts all don't agree on many things.
That's sounding like a climate science argument.
I'd favour going with the consensus and risk overreacting - rather than the inevitable alternative.
*Herd immunity may never happen with Covid-19
*Case fatality rates where it's been controlled (ie China) are very high, but nowhere near as high as it will be when it swamps the health system as will be inevitable in some country that tries that crazy idea.