Calories in calories out is one of those things that’s technically true but useless. Fast food is designed to be morish and addictive and is very calorie dense as others have said. So technically 3000 calories is 3000 calories no matter where it comes from but if you’re actually interested in your health and losing weight the specific food you eat is going to make a huge difference to your ability to actually succeed long term.

But yeah, calories in calories out. That doesn’t mean all food is the same.