The excuses used by a propagandising dictatorship (for basically everything they do not just this) wouldn't be effective propaganda if they didn't touch a percieved need.
Even as adults, many find Facebook and Twitter in particular to be repugnant, and use them anyway as an addiction. LinkedIn is more the butt of jokes about how everyone is excited by their new future even when they're newly looking for work, but at least they have minigames now.
YouTube, Instagram, and TikTok have a reputation for funelling people into conspiracies, but IDK if that's totally fair or them getting painted with the same brush in a moral panic.