The whole concept of 'eating 5x a day' isn't just to say you are eating 5 small meals a day, it's supposed to also make it so you never reach the 'IM SO HUNGRY I COULD EAT A COW!' mode and overeat.
Same with the whole IF crap. In the end, all it's doing it making you eat less than you would if you weren't doing it.
Sure there is a bit more to it than that, but at the most basic level, you're eating less in certain scenarios versus other scenarios. And when you eat less than you burn, you will lose weight. But if there is more too it than just weight loss, there are benefits of doing stuff different ways.
To this day I do not understand why people think there is something magical to losing weight. It's such a basic principle.
I was also talking to my wife this past week about how I don't understand how people are so concerned about "looking good" and buying fancy clothes, putting on all this makeup, yet they are still fat. And in the end, the one thing you TRULY have control over is your weight. It's 100% on you and nothing else. Whereas many people don't have the means to buy fancy clothes, expensive makeup, or even changing their looks with what they were dealt in life.