Most major news sites, as well as some other sites of reading content like Medium, have a paywall for certain articles, but those are easily defeated by people who bother to search the internet.
As I suspect said companies are aware of that, and they don’t react to properly protect their paid stuff, what do they expect to gain?
You overestimate the number of people who are savvy enough to bypass paywalls, or at least willing to put in the effort to find the content elsewhere . It’s an insignificant number compared to the general population that it’s probably more costly for them to do something about it rather than let it be.