Just drill the holes dont be a wussy.
The holes are tiny anyways so if you mess up just tac weld/plastic weld the hole shut, grind/dremel weld and redrill.
The purpose is to hold the outer sides of the bumper up and to aid in a faster removal.
You know some people like their cars low.
Or drive like a jackass.
Which leads to falling/ripped off bumpers and broken bumper tabs.
Therefore the need for the quick releases.
It's a cheap fix that works and looks decent.
There are better looking alternatives
but password jdm's is the cheapest route besides going the piece together DIY route.