The term "high heels" is subjective and wearing high heels is not bad. The notion that they are bad is puritanical and was probably a notion taken by some "holier than thou" trad to show that they are, well, holy. High heels on little girls and adolescents is inappropriate as it encourages them to lose their innocence. Ask any mother who has had a few children what they think about heels… They will probably tell you never again!
Bottom line, if you like 'em, wear 'em, and if you don't, MYOB.
I find it odd that you think little girls and adolescents will lose their innocence by wearing high heels, while seeming to deny high heels are sɛҳuąƖ and inappropriate for women striving for modesty. I'm not quite following.
Even so, there is no need to take nutty, puritanical, holier-than-thou trad Catholics' word for it. The world has no qualms proudly admitting everything that has been stated in this topic. They think this is good. They believe they are freeing our oppressed society from the chains of ʝʊdɛօ-Christian morality. So they proudly proclaim it for all to hear. Or at the very least, many are neutral and don't care either way, therefore have no motive not to be truthful. A quick search will give you the history of how, why and when high heels came back in style for women, as well as study after study after study proving/confirming the sensual effect of high heels.
I have noticed the only ones who regularly protest these truths are the men/women who are living a dichotomy between their Faith, words and actions. These are hard habits to give up so we sometimes prefer to be blind. Ignorance is bliss. Until it isn't.