Low-carb, good fat diets can help with weight loss. That is a scientific fact In many cases, this happens even without conscious calorie restriction. As long as the carbs are kept low and protein intake is high, people lose weight
However, this does not mean that carbs per se cause weight gain. The obesity epidemic started around 1980 but humans have been eating carbs for a very long time.
The truth is, refined carbs (like refined grains and sugar) are definitely linked to weight gain, but whole foods that are high in carbs are very healthy.
Whole, single ingredient carb-based foods are incredibly healthy. Keep to eating real food and you’ll find you are choosing ‘good carbs’ anyway.