People can have healthy low carb and healthy low fat diet, or the opposite for both extremes.
Most didn't get fat eating lentils or rice stuffed capsicum, so blaming the "carbs" is a bit quick.
The point of this discussion however is the zealots who preach one diet being superior to others, usually thanks to new data, new discoveries you have been lied to, or whatnot nonsense that goes on the fringe of dangerous, such as high cholesterol is not bad for you, eat as many saturated fats as you want.
Any diet that restrict somehow calories intake will work. The one you can stick with is the best for you. You can restrict calories in many ways, reducing a macro (carb) is one of them. When calories and proteins are matched, there isn't much difference between low carb or low fat.
My mother has no idea what a carb is. Happily eats croissant every weekend and baguette every day and is still as slim as she was on her wedding day 50 years ago. You will never however see her taking a bite or drink whilst walking, in a car, on the beach, at the park, anywhere. She doesn't carry food in her bag. She doesn't have a junk drawer. She eats 3 times a day, always seated at a perfectly put table. My kids are never allowed any snacks when visiting. You don't eat between meals is a big mantra in French culture. You eat good food, fresh food, and avoid the cochonneries . In French there isn't a word nor verb for snack. There are a few words with similar sense, but you will never hear a child say I want an " en-cas. ".
One of my son's friend called us " an ingredient family" because we didn't have any ready-to-eat food. Everything required mixing ingredients. There wasn't anything to grab and eat.
When you restrict a macro, you have to become an ingredient household, and maybe this is where the dietary success comes from. Unless you start buying keto bread, keto ice-cream, keto crisps . Or the low-fat equivalent . Grab and eat.
Food quality matters, whatever diet you are on. It is what ends up in your mouth that matters, not what you avoid.