Am probably going to risk your wrath here, as the mother to a great sleeper.
I 100% subscribe to the view that it's mainly the luck of the draw whether you get a good sleeper (or eater, imo), but do believe that certain parental intervention can make a bad situation better, with both eating and sleeping.
I cannot imagine having a non-sleeper for months or years on end, it'd probably just about kill my marriage. It must be really, really hard, especially when you work and/or have other children.
As such, I just cannot get my head around why things like a bottle of formula, or baby rice in milk, or whatever else people suggest as possible solutions (CC, CIO etc) are such no go's (this is assuming they work, of course).
If you are so crippled by broken nights, what is the harm in these things?
Is the conclusion that either the sleep issues are not so bad, or that formula or baby rice or CC or CIO are so bad that endless broken nights are worth it?
I guess I can't understand the logic of "this sleep issue is killing me" in the same breath as "oh but we don't want to try x, y or z", when x, y and z have no side effects that would seem to be as bad as the apparent side effects of continual broken sleep.
Please help put me right, maybe I'm missing a link in the chain of reasoning somewhere!