Black Cloud
Case Sensitive
It's an apt analogy. The point is that freedom to select from six different kinds of junk is a very poor kind of freedom to celebrate. The analogy to junk food also works because it is self-sustaining. The more you consume, the more you want to consume exactly the same stuff.
"Freedom of choice" and "individuality" are ideological constructions like any other. They way they actually work in the world is sometimes surprising. The main thrust of Jaron Lanier's fine book "You Are Not A Gadget" is precisely that Web 2.0, which ostensibly offers a wider range of choices and access to information, as well as ways to express one's individuality, is actually producing the opposite result. Infinite choice and total access take us toward a surprising conclusion. The Internet becomes an endless network of rootless differences in which the individual finds herself trapped and eventually destabilized. As Fredric Jameson writes in his new book on Hegel, "Difference, by gradually extending its dominion over everything, ultimately comes to liquidate identity as such, in a well-nigh suicidal meltdown in which it must itself also disappear (inasmuch as difference is necessarily predicated on identity in the first place)."
That's true if you concede that everything on the internet is junk; it's clearly not, and I don't think even you believe that. It would also be true if you believe that the average person lacks the ability to decide for themselves whether something is junk or not, or the consequences of ingesting junk (be it information or food). I don't know how many average persons you really know in an in depth way, but while they may not share your vast field of reference, they can use information, think critically, and make sound decisions.
Most average people don't labor under the delusion that their choices are free; they are aware of the limits of their lives in a way that the intellectual elites are not. The results of their choices might not necessarily be what they want, but they haven't historically had the time or the resources to overcome their circumstances. Their reality isn't especially customizable, as has always been the way for the majority of people on this planet. They never had the illusion of control.
But as stated in the OP, internet access has allowed them access to more information than ever before. They don't need the right qualifications or ample leisure time or money to buy books or transportation to the library to get their hands on information, they just need to type something into any computer with web access and sort through the results in their own time. They're used to settling for "good enough," and that's what you find on the internet. They know the internet, just like life, is full of lies, garbage, and people's bullshit opinions, and they're sensible enough to sort through that. As a matter of fact, in most cases they haven't read much dystopianism, so they don't even know they're supposed to be afraid of technology.