You can't compare guns to drugs, because they have different characteristics. Guns are made to directly harm someone other than the use; drugs aren't. Drugs are smaller, more easily transported, can be homemade, and aren't individually registered. All of these mean they need different laws, different regulations, and different solutions to their problems.
It's the same kind of faulty logic that people use when they compare guns to cars, or plastic bags, or ball-peen hammers. If you want to argue for loosening restrictions on guns, that's fine, there are a lot of good points to be made, but this isn't one of them. This is the kind of thing people hope is the unarguable home run, but actually just shows that they have no actual argumentative leg to stand on.