No you are actually missing the point. If you are on lemmy.your.opinion, then Facebook is not going to be the most prevalent voice unless the rest of the people on your opinion instance support the posts coming from Facebook.

That's why when you log into your instance, you mainly see feeds from your Instance. You cannot "game" an algorithm you don't control.

Your fear comes from the influence the mainstream social media platforms weld. And they weld it because of their homogeneous control over their platforms.

The more you try to exclude them the easier it is for them to exclude the smaller players.

You exclude Facebook, then Google, then Microsoft, then Twitter. Then they all band together to push out the rest of us and then you lose another open protocol to absorption or subversion.

I'll call it now, this is how it will go down. Just like all the other open protocols I've seen over the last 25 years... Technically savvy people push back on general adoption because we are generally snobs and elitists.