but the point, which you missed , of my post was not about the good or bad of each things I noted but the general understanding of those laws as being "universal" in the US
The correct understanding of what you pointed out is that the states have the authority to regulate everything you noted not that they are "universal". Speed limits? set by states, drinking age...set by states(albeit strong armed by the Fed), smoking age...set by states. See the pattern there?
And the more important point which you have missed is that the federal government has limited authority when it comes to making "universal" laws. It is important to understand that, particularly when the proposed "universal" laws apply to a fundamental right to which the federal government is expressly constrained from restricting. In this specific case, please cite the authority with which the federal government can regulate an intrastate transaction between two private persons.