If you can’t see yourself doing extended fasting, 20g total carbs, zero carb, carnivore, every day….Forever…Find a healthy, sustainable version of lower carb or any eating pattern that suits you. Many people lose weight and maintain the loss on high carb vegetarian diets, if they commit to doing it forever.

It's not Carbs OR Fats, it is staying away from the hyper palatable Carbs + Fats.
A good explanation by Marty Kendall how to lose weight on any diet and how to keep it off.
https://optimisingnutrition.com/car...-carbs-and-fat/