I think you've summarized the problem better than anyone else has. This is the crux of the issue.The fact that the EF scale is being made an engineering standard mean it'll be much harder to make changes to the scale when needed and will further entrench already poor practices. It also shows the wrongheaded centring of the thinking around it. The Fujita scale was intended to help discern the intensity of tornadoes, not to discern an unrealistically minimal possible windspeed to cause damage against an apparently overly-strict model.