Idk you're basically asking people to think in a way that they really don't process info. Its akin to being like "in order to understand my point you have to complete this trigonometry problem" and they're just gonna go, "nah" and then revert to their heuristic.
They might like Facebook, or really rely on google. So all you can do is talk a little bit about alternatives. Since all these companies spy and steal data, they are speaking from a place of like resignation. Asking to stop using any service is kind of a maximum demand, not in essence (I actually don't believe in min/max political demands) but in affect. Its like, to stop using google would be a major change, require some intimidating technical expertise (are you gonna offer IT support for their Grapheme phone/Linux Mint computer?) and then all the other services are just gonna steal their data anyways. Leaving Facebook is scary and hard, its like an addiction. And like all addictions you can fully know that something is wrong, and still be afraid or fail to quit it. There has to be a breaking point and you're not gonna be able to offer that in one conversation.
The better strategy is to try and find common ground on problems that people are concerned about, like data centers, and then offer actions or political leadership. If we really care about an issue, then the best method I have found is to schedule one on ones and try and draw people into work. If you want to teach then you need a theory of pedagogy and the idea that good ideas can replace bad ideas is fundamentally broken.