I have multiple points!
Then make them.
For example, kickers and bangs have three flaws that I can see:
1. They are tied to particular characters, but don't necessarily encourage the group to get involved with one another (and can even discourage it, if they are badly done).
2. They are a means of classifying plot hooks based on the gamemaster's perspective, but they seem to be designed by players, which is clumsy (though I could be misreading this).
3. They only seem to set up the start of the story. Many other games include things like enemies, dependents, patrons and driving goals (to steal some examples from GURPS) to help create plot hooks. These are superior because they can reoccur throughout the story much more easily.