Just because you yourself cannot be competent in everything, does not mean that being dependent on a monopoly is the same as having to buy certain things from p

Just because you yourself cannot be competent in everything, does not mean that being dependent on a monopoly is the same as having to buy certain things from people who are more competent at producing or maintaining them than you are. Noone guarantees you that a year from now you will be able to find anyone who is willing to fix your plumbing. That does not mean you might as well have proprietary Microplumb products installed in your house that noone can repair or extend without permission from Microplumb Inc.