my interpetation of your post is that the harm is it undermines what the "west" preaches about freedom. There are many laws which limit freedoms - limits on freedom of speech and expression. the decision to limit those freedoms should not be taken lightly but that doesn't mean that no limits are acceptable or that those limits are "dictatorial". I believe in freedom but some limits are necessary.
The question here is whether the harm created by the ban is greater than the harm created by allowing the burqa. as i have posted a couple of times now- I don't know the answer to that question and as you are not a muslim woman living in a muslim community- I doubt you really know the answer either.
Rapists used to try to defend their indefensible act, by saying, "She dressed like a whore, it aroused me. How was I to know she wasn't that kind?"
There are still men who think that way—perhaps like Murdering Mississauge Father—that men cannot control themselves, therefore women must dress like nuns, or in shrouds. But the law and the courts have made it very clear. It doesn't matter how she dresses, that's her choice, and irrelevant to the man's crime.
Imposing one standard of dress on every woman because a criminal committed murder would be the equivalent of responding to rapes by requiring burqas, chadores and the like for all women. Forcing the victims to change is no way to solve crime, or teach their victimizers anything.
Of course there is no unlimited freedom, but when you want to take away freedom, however noble your purpose, or trivial
you may think your restriction is then you must justify it. Only after you have demonstrated a limit is necessary do you then get to the balancing of one possible restriction against another.
You haven't done the first part yet.
Oh, and
PornAddict used the same sad case, you might just ask him for a historical summary of how we got from requiring underwear on overly shapely piano legs, bowdlerizing Shakespeare and the Bible, and banning books that used the word 'pregnant', or showed laypeople where babies came from, to enough enough rank porn available that you could joke about being addicted. And still haven't collapsed into debauchery.
What history has shown us about 'reasonable' limits to freedom, is that they are mostly unreasonable and almost always entirely unnecessary.