Not necessarily, my playing cue is 18oz, and I played with a 18oz break for a long time, had a really good break. Got shipped a 26 Oz break just to try their product for free and never looked back. I had the same thought as you at one time
Some people do well with a heavy breaker, I break poorly with a heavy breaker but everyone is different. That's why they make lots of styles, configurations and weights. Whatever works best for the individual.
My opinion is that a player that has never owned a breaker should start with what feels the most familiar then experiment from there. But that's just my opinion.