And with all respect I must also disagree with some of your verbage.
The repeted use of the phrase "she'll be" is assumptive--and used in such a manner as to sugget something that WILL occur--not just a possiblity.
"Good" schools don't do those things----sadly the "marginal" "poor" and downright "bad" ones are much easier to find.
Always a challange to find a good school.
Also there are many reasons why a student might be "marginalized" that have nothing to do with gender.
And doing that to a student is often/mostly--but not automatically a "bad" thing--all kinds of weirdo's and timewasters in the dojo might well be marginalized for good reason.
(however, if your takeing their money--you should be teaching them--if their good enough to take their cash--you better be providing services)
People are often "descrimnated" against in dojo's--mostly for bad reasons such as perceptions being just plain wrong--that they are "lazy" "not serious" "weak" "lacking the "killer instict" "not following directions" "not practicing at home" not "training hard" not listeing." etc.
ie BOTH good and very bad reasons.
These are just a poorly and innacuratly applied to men as well as women.
Unfortuantly stupidity is not a gender issue
--it seems to effect pretty much everyone at times.
Again, focusing so strongly on the assumption that women will be "discrimnated" and "marginalized"--IMO might lead to a sort of "self created" situation---where since one "expects" such thing to occur one "creates" the very situation they fear.
Another potential problem is the "easy out" a person can find by just chalking their problems up to "descrimnation" and "margeinlaztion."
They never have to consider their own actions and mis-perceptions and unrealistic expectations---and its an all too human trait to REFUSE any form of self reflection or personal responsiblity---as long as people have "reason" that permits them from taking any blame/responsiblity--they often as not, sadly take it.
Just some thoughts.