I’ve seen people stop themselves from crying. They really didn’t control their emotions, they just stopped the show of those emotions on them. Did they think of happy thoughts to get themselves to not cry? If so, didn’t that control their emotions? Did they really go from sad to happier by not allowing themselves to think those sad thoughts and forcing happy thoughts? Isn’t that the basis of CBT?
Sometimes I’ve felt one way and I tried to force myself to feel another way. Have you ever read the DBT workbook? This is the focus of that. When you feel strongly (bad) about something, then you force yourself to go over a whole other course of logic to minimize those bad feelings, you can change your (bad) emotions about something.