I'm not sure the issue is always false warnings etc, tho undoubtedly that is part of it... some of it is likely communication. There are still plenty of people who don't even know the difference between a watch and a warning. I don't know if the science is truly there yet that you don't have to overwarn at the margins "just in case" etc. I do think that the conventional wisdom of finding an interior room is not necessarily helpful in the extreme cases. I don't know what the other option on that level is though other than figuring out a way to have a better idea that a tornado is going to be an EF3/4/5 before or as it is happening. Still, some people probably just can't get to where they need to be to survive in some cases.