Well, the OP had some exposition at the original post. IMHO the point is that SQM offers per-flow-fairness by default and allows an easy way to implement per-internal-IP fairness on top of that. IMHO that covers a lot of middle-of-the-road use-cases (especially on links with "enough" speed), BUT there are situations where the user actually requires targeted un-fairness, and that requires more involved configurations. This thread as well as the one that spawned it offer a specific refined script to allow loads of targeted unfairness, and can serve as great example of how to do that.
In a sense, the standard SQM scripts aims at "good enough" while these scripts go the extra mile to make things even better (but at the cost of requiring more involved configuration).