I understand what you mean, I've had trouble with this myself. Due to emotional abuse at home I wasn't allowed to feel sad or angry, only happy or scared. Which led to me becoming quite emotionally scared - terrified to express emotion, expectation that I should be happy all of the time, thinking that showing emotion was weak etc. Couple this with a controlling mother who never allowed me to try any household chores or have any independence, and you have a 18yo going to uni with no idea on how to boil pasta!
I'm better now. I learnt to cook for a start, and I recently moved away from home. I'm working hard on reversing many of my beliefs and find it really hard to deal with feeling sad. I'm also recovering from addiction, incidentally many addicts I know say they felt afraid to show emotions too.
My self confidence is coming on leaps and bounds and I'm in therapy which is really helping me.
You see things at the office that are so minor yet a big fuss is made over them - eg my new job is Inherently stressful. It's target based and very long days,quite a high pressured job. Yet we now have mindfulness days on our company where a colleague can take a day , paid, off to reconnect. No requirement for previous MH issues or a diagnosis, just take as you fancy.
I Don't think the overkeen labelling particularly helps either. Anxiety for example- anyone who is a little bit anxious has anxiety now. It's normal to feel down sometimes, it's normal to feel anxious about certain events eg starting a new job. Labelling anyone who gets a bit anxious sometimes as having anxiety actually diminishes real sufferers experience. Also , on a personal side - I don't know if I have anxiety or not.. I know I'm more anxious than most and my self confidence is on the floor. But if I were to tell myself I have anxiety so getting to work is a massive thing, that then lays the groundwork for the day I feel a bit anxious to say I'm not going to work. Whereas if you acknowledge it but don't let it define you that helps.