I see keto as a simple concept – “Minimal carbs. Adequate proteins. Fats as needed (for satiety).” But that doesn’t mean weight loss is easy.
You need the minimal carbs to stay in ketosis. The big advantage there is that carbs and insulin are no longer creating a false sense of hunger.
You need to get enough proteins. Your body needs them.
After that, fats (and thus calories) determine weight loss. Ideally, hunger would drive that. If you are depriving yourself, keto won’t be sustainable. If you’re eating to meet a guesstimate of a macro even if you’re not hungry, weight loss will be more difficult. Remember, your need for fat can come either from what you ingest or your stored body fat.