Lots of people carry knives and flashlights either on a daily basis, or when they expect them to be useful. Lockpicks are a slightly more niche hobby/professional group, but that is also not ALL that goes on on this site.
Just because you are not interested in the stuff that is being sold here doesn't mean that somebody else isn't, shouldn't be, or is prone towards aggression or theft.
I don't see you complaining to Pier One Imports that the don't sell records, nor to your local grocers that they don't sell furniture. If you want vape stuff, why not swing by your local smoke shop? Why MUST Drop be the one to sell you your smokes?