You are mixing two different things. Formal papers ask whether a man can read a file, while the right to govern a people asks whether he is of them: born into the land, raised in its tongue, bound by its customs, answerable to its ancestors and its way of life.
A Yorùbá who cannot speak Yorùbá language fluently has already failed the second test for a Yorùbá state.
An outsider with a clean CV fails it completely. No WAEC, no degree, no “questionable certificate” debate changes that. Paper does not confer ìbílẹ̀.
Now, Tinubu’s schooling, real or disputed, is a separate argument about the presidency of Nigeria. It is not a licence to hand Yorùbá states to people who are not of the land, and it is not proof that language and belonging are “iwa wèrè,” unless the talk is about the South East. A people that lets strangers rule them because those strangers sat an exam has already surrendered.
Qualification never meant, and will never mean, that an outsider is fit to rule Yorùbá land.
A non-Yoruba-speaking Yoruba citizen is unfit to govern a state but a person who didn't have primary or secondary school is not. And his tertiary school certificate is questionable; he can preside over a country.
Yoruba APC and iwa werey na Tinubu and hardship.