I'm not understanding your conclusion at all. In an environment not taking precautions above normal flu season, the r0 for covid-19 is significantly higher than flu (2.6 vs 1.6) - in part because we have partially working flu vaccines. If it can't be contained, it'll be far worse.

Now I suppose measures China style will drop its transmission rate below flu, but at the minimum that's a heavy economic cost to be concerned with.