Counterpoint- people are down voting because they think its unlikely and many people are inherently gaurded against conspiratorial thinking- especially if they think it's unrealistic.

Whether you think its happening or not, the idea that the only reason anyone would downvote is because they're "opperatives" of the big social platforms is kind of out of touch with the fact that there are lots of people who don't think like you do. I'm a real person, love open source, and love the fediverse (have 3 lemmy accounts, plus an account for mastodon and pixelfed each) and I was tempted to down vote certain comments just because they seemed silly and a bit like fearmongering that there's a big bad boogey man out to get us.

I hope I'm being clear, communicating on the internet devoid of tone or facial expressions is hard- my point isn't that your perspective is silly, my point is that there are lots of people who would sincerely see it that way and disagree with you. Assuming that being disagreed with is a sign of the sort of conspiratorial situation you're describing is a self fulfilling prophecy. I hope I'm not coming across as hostile, that isn't my intent

Personally I think the other platforms are unlikely to see the fediverse as a problem until it proves it can be, because CEOs are stupid, and after eons of not having meaningful competition in this space I think they're likely to be overly proud and look down on our nice little platform. I think its far more likely its just the internet being shitty because lots of people on the internet like breaking or ruining anything they can, regardless of whether its a good thing to have exist. I could very easily be wrong, and perhaps other platform's owners do want to kill what we have before it can manifest into something bigger, but either way there are lots of sincerely held perspectives that might drive someone to down vote some of the comments here just because they think the situation being described is unrealistic.