I'm sorry; I couldn't see the bolded portion on my phone.
How are they the worse offenders? Most of the females I've met seem to know their interview attire, quite a bit more-so than males.
Others have answered your query for me but I think its a combination of:
1) women *think* they know what's fashionable or looks well on them, so they don't research what's appropriate for medical school and residency interviews
2) women have trouble differentiating from "dress-up" as you would do for an interview and "dress-up" as you would for a party; hence the not uncommon mini skirt, shiny fabrics, FM heels, high slits, cleavage, etc.
3) they have many more options than men do
4) like some men, they may feel they are a special flower and that it doesn't matter what they wear because their "true" self will award them a position or that the rules don't apply to them
5) lack of role models; I'd venture that more males have a male role model who dresses professionally than women do
So most women understand that they can wear trousers or a skirt; many understand that means a matched suit. But there are some who go horribly wrong for the reasons listed above. Others need fine tuning because of some common misconceptions and/or a complete lack of interest and understanding for things fashion.
IMHO the men's interview threads around here are mostly fine tuning ("does this tie look good with this suit", "how about these shoes") whereas the women's thread often contains pictures of dresses, suits, shoes, and coats that are pretty far off from the ideal and in some cases, laughably so.