Not necessarily, but you need to focus on certain fats - not all fats are equal. Full fat dairy (sour cream, heavy cream, butter, etc) is good but milk isn't great for low carb due to the sugars it contains. Olive oil and canola oil are good fats, as are tallow and lard.
One other thing to realize is that fats contain 9 calories per gram vs. 4 calories per gram for carbs and protein (alcohol is 7 calories per gram). When we talk about the percentages we're talking about calories, not grams. So eating a high percentage of calories by fat means you are taking in the same calories in a smaller total volume of food. Fortunately fats and proteins are what make and keep you feeling full.
I do think there are many healthy ways to live/eat. For me, carbs are very bad though many other people can eat them without issue. Keto has helped me reverse my type 2 diabetes, which was the entire point of my program; the weightloss was just a happy accident.
That's great that you got those results with the keto diet. I was more thinking about that from my perspective.
I don't need to lose weight or fight diabetes, and based on family history I shouldn't, unless I completely lose it. But that same family history means I do need to be mindful of heart health and cholesterol, so a diet high in saturated fats isn't the best. (And why I was amused at the "Butter and bacon and creamer is good for you!" post).
The comment about satiety of foods is a good point. I've found that incorporating sides like beans or avocado goes a long way in that regard. Keeping healthy snacks on hand like fruits, veggies, and nuts will also help.
Avoiding empty carbs is good advice for everyone.