Seems like you never learned Mishna Brurah and Beyer halacha on siman 75 (although the Shi"a referrs to krias shma, the mis"b makes very clear that on the street its never allowed).
Look also in Shi"a ans Noishai Keilim on Aven Haezer siman 15.
The mishna Berura as is the whole siman 75 are talking in regards to the male. The M"B never says anything that resembles what you quoted above.
In regards to Even Haezer 15, there are 32 seifim and about 10 nosei keilim on the sides, which one are you reffering to? I am afraid you don't know because the whole entire siman including all of the nosei keilim that i've seen have absolutely nothing to do whatsoever with this issue, rather it's talking about who is an ervah in regards to getting married and having relations.
The Issur for a woman being dressed immodestly ( without all of the inyanin, zohar etc;) Is a D'orayso of Lifnei Ivair. Also the Rabeinu Yonah in shaarei teshuvah and The Ramban i belieive in shaar hakedusha write That a woman gets the same gehinnom when she is dressed immodestly, as a male gets when gazing at her since she has caused the sin.
There are deffinitly other issues as well, but this for starters.
Cheerful Purim