Zuck's other financial and personal interests could compete with his money in the company. Unlikely at 1:1, but it's more possible the higher his vote multiplier is.
I've never understood this part of it. There's a disinformation problem on all of these platforms, so why not just kill all of them? The only argument I've seen is basically that it's better for the West to be the ones manipulating people in the West vs. having people in the East manipulating people in the West. And that just doesn't feel like a good argument.
This is only relevant if people are manipulating others for the betterment of the culture, and that feels overly optimistic IMO. If everyone is just manipulating for selfish reasons, they'll happily destroy their own country.
As much as there are legitimate reasons to go after TikTok, I can't help but feel it's not a coincidence that it gets singled out for legislation because it's the only one owned by China.
And yes, that ownership is problematic but I would argue that the others including those you've listed here are equally problematic for the safety of users.
So to answer your question: they should be too, but they likely won't, because the force behind this isn't a desire to protect users from disinformation, the desire is to protect western companies from scary Asian competition. Same reason behind us constantly propping up Detroit. Protecting people from disinformation is just an excuse.
> I can't help but feel it's not a coincidence that it gets singled out for legislation because it's the only one owned by China.
Of course it's not a coincidence. It's not even a hidden, implicit unspoken motive, it's openly explained as the reason behind the concern! TFA explains this clearly, numerous times.
Verizon competes with T-Mobile and AT&T. Comcast competes with a different arm of AT&T, Google Fiber, various older satellite internet services and now Starlink.
Outside the US, broadband providers are still huge but differences in regulation mean there are five or six of them in most markets.
Overall, I think my point still stands: claiming that you can't build a giant company without Silicon Valley's growth formula is ridiculously narrow. The vast majority of big companies are built by other methods.