The vast majority of regular internet users never think of things from this perspective because they've never been in a position of running a public facing website. To most people, the Internet is just there to be taken for granted like the public street and park outside someone's house. All the stuff on it just exists there by itself. That's also why we have issues with free speech online, where people expect certain rights that don't exist, because these aren't publicly owned websites and people aren't getting that.