That sounds like a tautology along the lines of Creationist thinking (this is so well-designed, it must have a designer…)
If there are more powerful superiors, then wouldn't the same argument apply? They must be powerful because they have superiors, etc. etc. ad absurdem…
My point wasn't that any ONE person (Zuck or anyone) is all powerful or influential. The point is that SOLIDARITY i.e. ORGANIZATION itself confers power on the organization.
Organized power might be distributed where no one person can dictate the organization's direction. Or it might have an all-powerful-dictator. Either way, organizing confers power to the organized entity.
Corporations are powerful, even though they are constrained in various ways and the power is wielded by a mix of actors within the corporation.
Consumers / citizens who each act unilaterally have less power even though their aggregate decisions can have powerful effects in the market (because they are disorganized, they can only choose from what the supply side offers, we don't get true demand-driven products).
Organized power doesn't necessarily mean top-down either. See the Starfish and the Spider (book about decentralization). Decentralized entities are more persistent (no single head to cut off to kill them), but decentralized ≠ unorganized.