You have to understand that some things can not be different. Lets take an example that is simpler, that even libertarians might understand: Streets, you can not privatize streets. You can not have a market where companies build streets and compete for customers to use their streets. Because you can not build 5 different streets to the same place. Infrastructure like fiber internet is like streets, you can't have 5 different companies rip open every street to every house and put fiber into it.