I guess it depends on how hard you can (or wish) to break. I do not possess a strong break (I'm working on it!) but I still managed to shatter the ferrule on my playing cue, partly just because I was really too 'lazy' to use my break cue, and partly because I got better control with my regular cue. It was an expensive mistake as it cost me quite a bit to get my ferrule repaired and taught me a 'valuable' lesson.
I soon after changed my break cue and almost immediately got considerably better results than before, so maybe it was a lesson I needed, and I still have it, and another one as well!
The fact is that, in American pool anyway, tables being larger than UK ones etc., a big break is desirable. Also some rules do state that balls have to cross the string/baulk line, so that too necessitates a strong break. Either way, the break IS the most important shot in the whole game as it sets the pattern for the rest of the frame so my thinking is that it deserves special attention, not least with the type of cue you use.
Some break cues have tips that are banned in some areas due to the composition which allegedly procures a stronger hit. I think it's down to the individual, who should not be penalized for the type of tip material. (Spring loaded ones I can understand!!!!)
We all know that there are many types of break cue - even some that double as jump cues (I do not advocate the use of one of these. A jump cue is designed for jumping, and a break cue......etc.)
I actually have three break cues now - the old, crappy one, and two superb ones, which I alternate depending on HOW I am breaking or the state of the balls/table etc. It really IS that important.
Many pros spend long hours perfecting their break shot and WHERE they hit the rack. I think there is a lesson here, namely the break cannot be underestimate.
I would say, get the best break stick you can (spare your valuable playing stick) and work like hell on your break off shots. It WILL pay you many dividends!!