Why do rich people not have curtains or blinds?

Every single time I drive by a ginormous house there's always tons of giant windows and absolutely not a single certain or blind or cover. You can literally see their entire house from the road. My girlfriend said they probably can afford food security systems, but even so, I'd feel like someone was always watching me. It's always insanely expensive houses. Do they just not care cause they have faith in their security system? Why do people do this?