The market isn't exactly free. Many telcoms have actual and effective monopolies in their areas. Furthermore, this would basically destroy the Internet and establish artificial barriers to entry for new, innovative young companies.
You can look at many things like that. Gas companies, food companies, banks when buying property, computer companies, TV manufacturers, Telephone companies, etc, etc. With the internet, it’s my decision whether I want to use it or not and it’s my decision to say what I want.