My thought would be that one can't go around high all the time and the reality is that one would become "dependant" and there's a risk that it may become more of a crutch than one might want. The other thought is that perhaps it is more of an indicator of what triggers the stutter. If CBD (or THC for that matter) relaxes the person then perhaps you'd be better served to look at finding the root of the anxiety/tension and deal/sort that out; unless you're looking for an excuse to use CBD/THC. Just my opinion and thoughts gleaned from decades past. ​ HTH