I honestly don't really trust people who can't control their emotions... if someone does something or says something because they are feeling very emotional, where is the limit? People still need to be accountable for their actions, even if they are feeling emotional.
I totally agree that controlling your emotions is not the same as suppressing them. You're still absolutely feeling the emotions of the moment, you're just not letting them control you or make you do or say anything you'll regret later. Of course no one is perfect, and we all get caught up in the moment, but it has to be relative. If someone found out some devastating news I would completely understand, but if someone had a temper tantrum because of something little I wouldn't.