When a stimulus reliably elicits a particular response on a large enough population, you can reasonably say that it's the stimulus and not the individual's failure to apply moderation/critical thinking/what-have-you.
The two things you've said are access to "real time musings" which is absolutely not a requirement in the objective sense, and connecting to friends and people, which is a requirement that can be easily fulfilled by other applications.
Phones and email are still completely viable methods for communicating with anyone. Chat programs such as Signal or Apple Messenger or WhatsApp really only add the additional functionality of group SMS. Otherwise standard SMS is fine.
I think your point about moderating your eating is a good and valid point though.
Let's take the metaphor further. Let's say social networks as they exist today are like restaurants that serve 3500 calorie meals. Sure, a person could choose to pay $30 for a 3500 meal and then moderate their consumption and take the rest home in a doggy bag, but that clearly is not what is happening. Instead what is happening is people are eating the whole dish. And on top of that, the restaurant is adding a ton of stuff that makes the food taste more addictive, and other stuff that makes you not feel full so that you'll want to order that dessert too.
And to beat the metaphor to death, I just don't go to restaurants anymore, I make my meals at home.
They aren't the same type of control at all, implying it is deeply disingenuous like claiming beating your kids with a baseball bat and scolding them doesn't make a difference because it is just punishing them either way.
I implied no such thing. I nor the parent post didn't even mention traditional media. And I freely admit, it's not the same type of control. But it is control. They control what type of speech is allowed, what gets amplified, what gets suppressed, and what gets banned.
To go with your analogy, they don't beat their kids, but they do ground them, take away their allowance, or make them go to bed without supper, until they learn to behave. And the owners of social media get to define what 'behave' means.
You invite certain people, people can share things, text or even voice chat. You can curate, you have more control of what comes down stream.
What does a world without social networks look like? I don't think we want that anymore. Because social networks do serve a required function.
For Twitter, I love the fact that I can follow some people that I look upto and get their real time musings.
For Facebook, it's about connecting to friends and people I know and being able to reach out without phone numbers etc.
We are trying to solve this problem the wrong way. So again, gluttony cannot be solved by making a better dish, only way to solve it is to moderate eating