Following processes is a very good thing. If we managed all of our projects like we were shooting from the hip, then each one of our successes we experienced would be based far more on luck than any best practices. We would never be able to replicate what we did because there was no real plan behind it. Yes, a methodology is a good thing, a necessary thing if you want to have any hope of replicating your project successes and increasing your future chances of project success.