In my humble opinion no greater damage is currently being done to our new beekeepers than the damage by some of the "gurus" on here shoving treatment free down the throats of every newb who asks a question. I'm sure if you have at least a dozen hives and are ok with constant crashes, massive splitting to simply maintain hive #s each year, and are either into buying bees constantly as well or are someplace you can catch lots of swarms then you could be "treatment free" and live merrily. However when you have a first year beek or worse one without bees yet asking what should I do for x,y,and z and in swoops people saying "we'll I don't treat and I'm successful so don't treat either" you are setting that newb up for failure. Just think about it what's the difference between you? First year vs 5, 10, or 40 years keeping bees. New beeks face countless struggles and issues on their way to surviving the first few years, building their apiary to where they want it, learning the basics, and understanding what a normal healthy hive looks like. They are never going to stick with it if they never taste success.
As for brood breaks themselves as a form a varroa control pretty sure Randy Oliver has a graph on his site showing it does essentially nothing. Now a brood break combined with some other sort of treatment very effective. Honestly if brood breaks worked by themselves why do our northern colonies not come out of winter with less mites than when they went in? It don't hold water.
If treatment free is truly doable why don't some of the major "pushers" of said philosophy open the books on their apiary? How many hives do you have? How many splits did you make? How many queens you produce each year? #s of honey produced and total losses for the year? If it can be done and is something that you believe repeatable shouldn't be a problem providing some proof of it.