alt Hacker NewsIntegrity and character are about values and how you plan to behave and expect to have others behave towards you. They are not the same as your ability to process emotions that emerge as a result of that behaviour.
Having values is important. Integrity, humility, all of that, absolutely useful.
They are not in themselves sufficient to assure you of good mental health.
We care about the smooth processing of emotions, among other reasons, because when impeded it generally affects how we're going to plan and behave; especially when under some sort of stress. This is not something new to our generation; philosophers have had a clear undestanding of this for millennia, in both Western and Eastern philosophical traditions.