Netflix is no exception - they produce House of Cards and it's available exclusively via Netflix.
No, "House of Cards" is produced by Media Rights Capital and licensed for initial distribution through Netflix.
In Australia, "House of Cards" was shown on Showcase, a Foxtel-owned premium cable channel. In New Zealand, it was shown on TV3 broadcast channel. In India, it was shown on Zee Cafe cable channel, and in Latvia is was on LNT. It also has been released on DVD and Blu-ray.
Want to stream movies like Lawrence of Arabia and The Shawshank Redemption? I'm sorry, they're only available on Playstation Vue.
"Shawshank Redemption" is on Amazon Instant Video, Blockbuster On Demand, M-GO and Redbox Instant.
By the way, Comcast also buys early access to Sony films, including American Hustle and Captain Phillips.
Even on TV networks, companies swap content and distribution. For example, "The Mindy Project" is produced by NBC Universal, but distributed on the Fox broadcast network. "How I Met Your Mother" was produced by Fox, but distributed initially on the CBS broadcast network.
I think you underestimate the desire of Hollywood to distribute TV shows and movies through all appropriate mechanisms, though at the appropriate time and price points, in order to maximize revenue.