Sure, I get that there's utility in having an online presence, but these people are wealthy/powerful so they can afford to have someone do that work for them with the public non the wiser.
That wouldn't give that kind of narcissist the same level of satisfaction as they get from the army of sycophants clicking "Like" on their latest hot take.
I think that direct connection is particularly attractive to the right kind of narcissist. Might be the best drug they've ever had.
They're online because their followers are online. Social media may be the actual lead pipes to our empire [1].
So yes, they are absolutely weaker than leaders with digital hygiene. But the reason they're there is because the American public is similarly weaker.
[1] https://penelope.uchicago.edu/~grout/encyclopaedia_romana/wi...