It's the same thing with guns. If you're a fudd and you have your grandpa's old hunting rifle, but you think AR-15s are "stupid and pointless and only the uncorruptable government should be trusted with them!" and you refuse to stand up for their rights when tyrannical law strikes, then they won't be there to back you up when they inevitably come for your hunting rifle.
Same for privacy and encryption, and getting off of big tech services and platforms. If enough of us get off now, we can be a force for change. But most people are content with sharing everyone they hang out with, what food they eat for every meal, and all of their life details publicly every day.