But is there any reason Comcast or AT&T is prohibited from entering the market and competing? If there is a demand for improved services, shouldn't they be abl

But is there any reason Comcast or AT&T is prohibited from entering the market and competing? If there is a demand for improved services, shouldn't they be able to do well regardless? Likely there are other reasons that make the market less attractive and not likely to be a hotbed of competition even if the CNS didn't exist.