Zoe - As humans, we tenaciously cling to our eating habits, often with the fervor reserved for deeply held beliefs such as religious or sacred values.
I include myself in this observation. Even though for a few years I had read about and considered low-carb eating as a good tactic for controlling BGs, I did not commit to this change until I was shocked by two diabetes' complication diagnoses.
Looking back, I can see that I was a carboholic and my devotion to carbs lasted for far too many years following my T1D diagnosis. I firmly believe that carbs are addictive to many people. In fact, I read one study that showed the pleasure center of the brain was activated when carbs are consumed.
What amazed me, however, was the relative ease with which I cut my carb consumption. After of few weeks I no longer had the gut-level desire to eat large quantities of carbs. Compared to quitting smoking, conversion to a low carb way of eating was simple.
Your ambivalence regarding dietary fat is a common one. Unfortunately, we only have three sources of dietary energy: carbs, fat, and protein. Actually, four if you count alcohol. Reducing carbs only leaves fats and protein. Science tells us that overconsumption of protein is not generally good for us and can lead to weight gain. That leaves us with fat.
The propaganda machine fueled by big pharma/big food interests has successfully brainwashed our society into thinking that fat makes us fat and clogs out arteries. This is not true. It has not been successfully demonstrated with any studies. What we do know is that high carb combined with high fat and high calories is a dietary disaster.
I agree that dietary swings from the extremes of "twinkies to granola" are not a good idea. However, I no longer believe in the absolutist "no pain, no gain" philosophy. My recent adoption of a moderate 40-60 minutes of walking per day exercise regimen is a "no pain, plenty of gain" experience.
In my life, changing entrenched habits worked best when I could do a satisfying substitution. Quitting smoking, cold turkey, was the hardest habit to break. Some people substitute with food but that never appealed to me. It required persistent and determined effort; it really is an addictive drug.
Our eating habits are really a complex mixture of nutrition, emotions, psychology, and social aspects. No wonder dealing with diabetes is so difficult!