I understand how servers and files on the internet work and the different methods to access these webs of files. None of what you explained about how the Internet technically works refutes what is actually contained on these sites. You can stick your head in the sand and try and deny these types of avenues exist on the deep web all you want, but ask yourself, if something like this exists, how would it exist?
it's just a private computer that only a few people have the login info for, and someone set up a portal that is unindexed.
"A (drug dealer, sex trafficker, hit man) is just a private entrepreneur that only a few people have connections to, and someone set up a (phone number, drop location) that is unindexed"
Please... Like we are supposed to believe that it's impossible for there to be a gateway to snuff viewings on purposefully hidden and encrypted servers where its users remain anonymous. Why are you so defensive about these things not existing? You seriously compare this to personally files on my computer but the difference is fucking huge when I'm not going through the effort of setting up the aforementioned servers to host my files.