We don't live in a utopia. It'd be nice if we could "end violence" or "end people invading peoples privacy" but to think that doing so is an achievable reality is naivity of the highest sort. That doesn't mean that as a society we should promote not engaging in violence and not violtaing peoples privacy, but it does mean that we shouldn't just ignore the realities and act like everyone should just carry along however they like.
WANTING there not to be violence or WANTING there not to be people who violate peoples privacy doesn't magically make it so; and if you live your life in a way that assumes those things don't exist simply because "they shouldn't" then you're going to have issues. Sorry, that's the truth.
And the dirty little secret is EVERYONE KNOWS THIS and generally engages in it; but they just don't want to acknowledge that when they're on their activist agendas. Why do I say that?
How many of you lock the doors to your house or your car every time you get out of your car?
Should you HAVE to lock your doors? Of course not. We should never fear that someone is going to come into our private property and take our stuffs. Our world shouldn't be one where such happens. But it does, and that's not going to magically stop even if we spend years and years as a society telling people that going into others private property and taking stuff is bad.
So we lock our stuff, because we know it's smart to take precautions against the realities of today. If we don't lock our stuff is it guaranteed it will be entered and things taken? Not necessarily. But there's a better chance that it's going to happen due to our irresponsability in light of reality. This is common sense type stuff that EVERYONE does.
Why it's okay to make believe that the world is a utopia and people should be free to act like that utopia exists in some cases, while in others it's routine to deal with reality as just that...reality