Your "idea" is sure not stupid
But...
The idea for a breakin cue is, (should be, better said), to be a bit more efficient. For example that a better energy transfer would help to get a better result by using the same break speed.
And of course, to not "ruin" your tip of your playing cue-that s also a serious idea. Some people can really break hard

and nobody likes to maintain his tip all the time- and if you reach maybe 25mph, your "normal tip" ill mushroom.....for sure
From my expirience, (and this is not meant dis-respectfully!), player with a lower skill level/amateurs don t really benefit by using a high-tech breaker. You ll get such a tiny "speed boost" by using one of these new CF Breaker for example.
I personally, and also some absolute top players tested it out. Measuring the speed, accouracy etc. - the accouracy did not really got higher ( ofc always by using same tip), and the speed increased between 2 and a max percentage of 4,5 %. And the results in makin the typical balls on the break ( we tested 8, 9 and 10b), did not really change.