Maybe not everyone is impressed by money?
The word "to" is commonly interpreted to mean "for the purpose of" in this context. That is, the contestant should put effort into making their appearance impressive. Which, I also find offensive, but to a lesser degree.
I'd propose that they certainly aren't "sport" sneakers, which is what she got dinged for. Unless you're a multi-millionaire playing tennis in a country club, I guess -- but the only reason a person would wear those particular shoes in sport would be to impress their peers.
And if you're not personally impressed by money, how would you interpret the "dress to impress" guideline? Would you find any shoes to be impressive? Perhaps no shoes at all? I'd lean towards 6" platforms, myself, as some people find tallness impressive.
See also: Tennis. Schools. Restaurants. Courtrooms. Offices. Stores. Even public sidewalks.
Welcome to society.