The wiki article does not support what you're saying. It even suggests 2 other methods, accusations of double standards, and hypocrisy. The main point is to distract from the actual conversation by using an accusation.
Common accusations include double standards, and hypocrisy, but it can also be used to relativize criticism of one's own viewpoints or behaviors. (A: "Long-term unemployment often means poverty in Germany." B: "And what about the starving in Africa and Asia?").
Might as well quote the relevant section.
Well would you look at that, there it is laying out exactly what I said. Deflection of an argument by accusing someone else of the same thing.
Stating that you're voting for Biden because Trump is a Fascist wannabe dictator is not a whataboutism.
Whataboutism is when you point to another similar situation and say "what about that".
You presented that as the only valid use of the technique. Even the section you just quoted says there are other ways to use it. That's why there's the words, "but can also be used to..."
Common accusations include double standards, and hypocrisy
but it can also be used to
relativize criticism of one’s own viewpoints or behaviors.
Its right there in the quote we're talking about. Are you feeling okay? I hate that this has to come from me, but you should probably talk to your family about any recent behavioral changes, and consider seeing a psychologist. This level of confusion and circular reasoning seems to be a compulsive and frustrating pattern for you. Get some help.