The world when Facebook was introduced: "Oh well, I guess I have no choice. There's nothing like Facebook, so I'm forced to upload my family photos to these people. I'm not responsible for doing that. Let me just find somebody to blame, maybe the family that's already using it? Nevermind that there are alternatives for keeping in touch. We don't talk about that. They're just not as convenient, so they're obsolete."

You do know that there were over a dozen social media networks that facebook bought over and effectively extinguished or merged into their behemoth right ? They deliberately ensured that choices were extremely limited. Any "alternative" that got popular and not under control of another behemoth was effectively taken over or killed. So your "use an alternative" logic just does not compute.