Every industry by definition has a monopoly on what you can buy
In my opinion the food industry having a monopoly on what we eat
Some food is grown or killed by people for personal consumption. Some of that is shared or traded between rural neighbours. Therefore, rural living can indeed mean that the food industry doesn't have a monopoly on what you eat. (I'm eating fresh strawberry from my parents' garden/store right now. It's great.)
(Remember checking assumptions every once in a while!)
Since you can do almost anything for yourself or your family, your claim is also an example of: "Using the word "monopoly" in this way abuses the word and makes it meaningless." Except for the only real-world monopolies, which are always government enforced.
This article let's me know I'm not the only one concerned at the dominance of companies like Google and Facebook. I don't have enough data or information to judge whether my continued use of these services are going to be detrimental to me or the rest of humanity. What I do know is that increasingly I'm feeling like Facebook and Google know too much about me and have too much of my attention. I feel a little bit like a puppet, a little bit strung along. How do others here feel?
It reminds me or is analogous to this. In my opinion the food industry having a monopoly on what we eat, just as Google and Facebook will have a monopoly web content. Is this a risk on society?