I don't know about where you work, but where I work, people actually talk to each other
In a large organization where its not possible to talk to everyone informally. And if some dev sitting in a corner downloads his/her favorite framework, nobody will know. Until the dependency lists are compared and someone finds out that this person went off on their own.
Don't get me wrong. I have no problems with the informal processes if you work in a tiny shop (maybe a dozen developers). But you aren't likely to have a 'devops' position. It will be a part time task of one of the devs. Or the admin person who does the job for all systems (devel, test, production).
But if you are installing stuff, even on your own workstation, you are doing an admin's task. And that means understanding the impacts of your actions upon your and your group's work product. At some point, your company might be asked by a customer to adopt some sort of process standards (think SEI-CMM, ISO 9000, etc.). That will either mean a manual process you must follow to make changes to the development/test/deployment environment. Or turning that responsibility over to a person assigned to to so (that means turning your workstation admin over to them). And I imagine that if the response to this is, "I don't wanna!", the boss will quietly show you to the door.