You're simply parroting what status quo narrative of the FDA and medical industry. You're wrong. Refer to the "refined sugar & white rice cures diabetes" video with Dr. McDougall above.
Uhhhh....? The FDA has never said sugars are bad. They don't distinguish between glycemic levels in fruits. All they talk about are 'calories'. "Keep under 2,000 calories, exercise, and you'll be healthy" they say.
I've never heard of Dr McDougall, so maybe he's right that refined sugar can cure types of diabetes. ? I don't know. My point is that even if it could, you'll likely have additional health problems because white rice/sugars are BAD for you, long-term, UNLESS you are eating high, high, high amounts of green leafy veggies and other nutrients to offset the sugars.
If you want to induce metabolic damage and, ultimately, weight gain, then have at it. If you ever resume normal eating sequences, you will end up gaining more weight than you carried prior to intermittent fasting.
Bruh, you obviously have no idea what intermittent fasting is. The difference between it and normal fasting (i.e. what is commonly referred to as 'dieting' and includes the negative things you talk about) is that intermittent fasting is not a lowering of calories. You eat 2-3 typical meals, as normal, but you only eat them in an 8 hr window. For the rest of the 16 hrs (7-8 of which you're sleeping) you do not eat any calories (except for black coffee/tea). The benefits of this are very high because your body is getting a break from digesting, which when one is constantly eating, takes up to 60-70% of the body's resources. When the body has a chance to 'rest' from digestion, it's able to spend time repairing, rebuilding and restoring all it's systems.
For some people, it may not work based on their metabolisms. For others, it will, because it fits into the 'hunter-gatherer' body type (or farmers), where one was active for most of the day, ate lightly because they were working, and had a big meal later in the day.