You might opt for the all-hook intro because you want to demonstrate up front your mastery of a body of relevant scholarship.
A noble rationale, but one that often has the unfortunate effect of suggesting to readers that you are so immersed in that scholarship that you haven’t figured out your own point of view.
Why might authors go for just the hook or just the I?
As we say, abstracts are spoilers not teasers, because they give your audience a condensed version of your whole article: what your claim is, why it matters and how you will conduct your argument for it.
Introductions, by contrast, are teasers that soon stop teasing.
We also want to note that using the hook and an I approach is ultimately less a matter of sheer quantity -- X number of sentences or paragraphs to others, and Y number to your ideas -- than of argumentative quality.
Good introductions do not just repeat what other scholars have said; they analyze it and find an opening in it for their contribution.