Like you've said the diet alone is not enough to cure candida. However, it is sufficient to cause die-off. The diet consists of avoiding carbs and sugar, because these feed candida. And yes, starving candida is good enough to kill quite a few of them and cause die-off.
Starving candida as well as, identifying your presonal allergy. You`ve mention oat, I am intolerant to gluten and I cannot have oat either, only buckwheat, millet and quinoe.
If at times, you feel suddenly very tired, you are likely to suffer from food intolerance and it is important to identify which food you are allergic to.