If that were true, then Keto wouldn’t make it easier to lose fat, and PSMF’s wouldn’t work as well as they do. It would also mean that. Calories matter, but a calorie isn’t a calorie, either. They all have different effects on us, just as carbs can put fat on us faster if they’re abused or the wrong ones are on, fat is less likely to do that when the carbs aren’t part of the equation. You can absolutely fatten yourself up on keto, but people with working satiety signals will many times under eat because of fat being satiating for many, as is protein.
That’s why unless you’re one of the blessed ones that can actually intuitively eat and get away with it, tracking accurately is mandatory unless you don’t like having a way to troubleshoot your progress, whether it be gains or loss.