Counter Intuitive

Recently, there was a law passed that the smoking age was raised from 18 to 21, including E-Cigarettes. They also banned E-Cigarettes from a lot of places that they were previously allowed. While I agree that making cigarettes age requirement higher, E-Cigarettes should be a little different. E-Cigarettes sole purpose was to help people to quit smoking, by purchasing juices that have lower percentage of nicotine compared to a pack of cigarettes. You can also get juices that have no nicotine in it, so smokers can cut off nicotine completely, but still be able to get the act of smoking in their system, if that makes sense.  Now that the age has been restricted for those as well up to 21, It seems a little strange to me. There are people addicted to smoking that are below the age of 21, so why make the product that helps people quit smoking, higher now? I can see them making nicotine based juices up to 21, but the ones with no nicotine, should still be 18 in my opinion, along with the units. What do you guys think? Should E-Cigarettes still be 21, or should certain kinds be moved back down to 18?