Interrupting isn’t confidence. Waiting your turn and still landing the point is.

Cutting across somebody is usually a sign that you are worried the point will evaporate if you hold it, which is anxiety wearing a confident coat. Holding it takes more nerve. You have to trust that the thought is good enough to survive thirty seconds of silence, and that you can deliver it without the momentum of the interruption carrying you.

Try it in one conversation this week: let the other person finish, count a beat, then say your sentence. You may find you say it better. You will certainly find people listening to it differently.