I don't think you are using "overreact" properly. If it's the appropriate response, then, by definition, is not overreacting. In line with what you are saying,

I don't think you are using "overreact" properly. If it's the appropriate response, then, by definition, is not overreacting. In line with what you are saying, a problem, is that the proper reaction, if works, looks like an overreaction later. So, politically, there is an incentive to do nothing.