Exactly. I never allowed myself to repeat, as I hated the idea of others hearing me repeat. So I was blocking aaallllll the time. Then one day, a few years ago, I told my wife I was going to stutter freely as an experiment and to overcome my fear of others (including my wife) hear it, I realised all the blocking ended. Yes, it does get replaced by repeating, but it shows the link between fighting/resisting a "authentic" stutter and blocking. The repeating is then another thing you can tackle as a next step. Let me know how it works out for you, if you decide to try it out.