I think this misses the nuances of these arguments. I can speak for my self, where my view points could be summarized to be to increase restrictions on guns and legalize all drugs. You would be right this seems to be inconsistent.
But that's not really my view point at least. Guns are necessary to some degree, but I dont think they need to be given out at as freely as they are. Not everyone needs one, i think we can restrict through something like applications you has one and who doesn't. Also restrict the types of firearms(And im not here to debate gun control, im just explaining there's more then just a one liner to the opinion)
With drugs, I think we can legalize them all. But this also doesn't mean a free for all on availability. We should have limits on marketing, age restrictions, improved education. Like heroine should be available from a store, but maybe only in a plain white box, with a label on it. No one gets to market it as cool.