What changed my mind was that I used to be fat, but then out of desperation I wanted to try out carnivore (I really, really never liked vegetables).

I have a biomedical background, so I was programmed to hate keto, for no good reason. I also repeatedly did the calorie counting thing, succeeded only once before yo-yoing back to obesity.

See, what they don't tell you about calorie counting is that it is a miserable existence. Sure, starting out with an 1800 kcal goal will make you lose weight, but in a month that will go down to 1600, then I had to maintain a 1300 kcal intake just to not gain weight. Our bodies really, really dislike losing stored fat, especially if insulin constantly remains high due to ultraprocessed garbage food they give us.