The dark web is a specific section of the *deep web that can be accessed only using specific software configurations or authorizations

The name make sense because it's in fact hidden, dark and makes quite a bit of sense, the problem is that dark things do make people quite a bit scared and that was then weaponized

And i say that because i don't want to go against whatever you said but to expand on the (in my opinion, too) simplistic view you shared

*the deep web is that huge chunk of the internet that is not indexed by any search engine