I dont get the fascination with it if you have no use for the content out there and given you know the sort of content out there. Like, why browse if you know whats there but you are not looking to buy or download whatever is there?
Do you get a thrill out of possibly stumbling on something illegal or something?
I doubt there is anything that can be obtained through Tor that cant be obtained using a normal internet browser. The internet is big and all manner of people use it, you just have to know where to look. Plenty of websites offer drugs, guns and stuff. The vast majority are fake but there are most definitely some real ones out there. A lot of the drugs obtained by people i knew in my study days originated from big orders off the net.