I get the point entirely because I've been making the same one myself. Leeloo is saying that she only buys what she considers suitable clothes for her DDs... she's making the commonsense decision about what is decent and what is unacceptable, and buying accordingly. If everyone did the same thing there would be no market for the trashy/sexualised stuff that seems to get everyone so aerated and demanding bans. The craze/fashion would fizzle out.
As parents, we're making decisions all the time on behalf of our children... what to wear, what to eat, how to keep them safe, what activities they do. Expecting governments to ban things according to what we think is acceptable/unacceptable is unrealistic.