Asking for an open minded friend.
The whole idea is that no party is "unrelated" and anything only makes sense when contrasted and compared, not on its own, on some absolute scale.
Even in the original Cold War meaning, the two parties weren't unrelated at all -- they were engaged in a Cold War, and one was criticizing the other. The accusation of whataboutism was then used to suss one side and keep the discussion one sided.
The whole point of accusations of whataboutism is to prevent the conversation to expand -- it's literally a thought-stopper.
>Perspective is about seeing the same thing from different angles. "But what about Zuckerberg" is not a difference in perspective, it's two completely different subjects.
That's not even a cop out. Perspective is about seeing a thing in general context -- how it measures, and how important it is related to others. Not merely seeing two aspects of it.
"Verb. put something into perspective. (idiomatic) To compare something with a similar thing to give a clearer, more accurate idea. You can put your worries into perspective when you realise how many people in the world are so much worse off than you."
As to your comparison, as far as I know Zuck isn't selling dangerous consumables, but rather selling your information. One has a direct harm, the other has potential harm.
Zuck isn't just selling data. The ads which are deeply targetted haunt you, it feeds on the insecurity of a person and reinforces their beliefs. This has caused many teenagers to suicide.
He is as dangerous as Ramdev if not more.