Model here. Facial exercises work, almost everyone who I work with does them. Im 100 percent sure most, if not all celebrities do them, at least those who are usually in front of the camera.
>why bro? nah dude if you're ugly you're just ugly you cant change that!!!
Sure, it won't make you go from 3 to 8, from 5 to 10. But there is a reason people in my field are obsessed with it. Face, just as the rest of the body- consists of muscles, and these muscles need training too. It makes a big difference, your face will look a LOT better in motion, you'll look better while smiling, speaking etc, and you might tone your assymetries if you have ones a bit as well.
Some quality fac.exercises here : https://www.youtube.com/watch?v=oJIk2PyukjY