It’s ironic that we’re having this discussion around Paris, a city which was deliberately transformed to make it easier to rule. Although the fear was revolution rather the ordinary crime, under Napoleon III grand boulevards were made to allow troops to maneuver, as well as to break up neighborhoods with too strong a sense of identity. It proved rather effective and was exported all over Europe and the world.
I mean, I get that you don't want your wife being called a filthy whore, I get that you want to be left alone at a bus stop, I get that you want women to dress however they want. I want all of those things too. I just don't see how getting rid of open spaces would accomplish any of that. Are all of these things things that can't happen on narrow streets?
Where I'm originally from, when you call the police, they don't show up. When they arrest the thugs, they're back out in a few days. Your freedom and safety are not guaranteed. In the US, my experience has been very different.
Not having open spaces will not prevent all this, but open spaces facilitate this sort of stuff.