In general, when it comes to diets, I’d agree with you, but Keto really does work. The folks I know who have switched to Keto have seen dramatic improvements in their life, including coming off meds they’d been on for years.
In addition to your recommendations (eating less and exercise), I always tell folks if you can’t eat properly, at least watch three things: water, weight and sleep. Keeping your weight down, and getting plenty of water (I drink around a gallon a day) and sleep will do wonders for your health.
I don't want to tell anyone what to eat or drink, just not my thing. I'm sure you got the idea from somewhere that drinking plenty of water is a good thing. It is not for some. Certainly, water is good for you, but too much is not. It puts a strain on your heart. One of the most prescribed medications for high blood pressure is Lasix. It's purpose is to remove fluid from your body. I used to take Lasix and I used to drink tons of water thinking water was a good thing. I used to have high blood pressure. I still drink fluids, but not as much. I no longer take Lasix or any other blood pressure meds. The major change for me was simple. Cut back on fluids. It didn't make a lot of sense to me to take a medication to remove fluids from my body when I could simply decrease how much I drink in the first place.
Here's what works for me: I don't go out of my way to put anything in my body. I don't force myself to drink extra when my body isn't telling me I need extra water. I don't force myself to eat foods that I am not hungry for. That would fall into the domain of some diet. It seems that my body gives me cravings for the things it needs. I listen to those cravings but just don't let it go too far.
I'm not telling anyone what to eat or drink, but drinking tons of water is one example that doesn't work for everyone. If it works for you, great. My body is craving protein right now. So I am off to eat bacon and eggs for breakfast. Just not a lot.