Disassociation as an ego defence

You know , when people are in situations where the source of pain is someone that is family or is related to them and when there is no way they can get rid of this constant source of pain, they have a very unique way to deal with it.
Such people develop a diassociated personality.
A stoic personality if you will.
They develop a shell around that pain and bury it deep in their head.
Such people can surprisingly perform very well at work and life in general coz nothing affects them. They continue to work hard no matter what.
Such an ego defence works great in terms of productivity, as in , a person can become an overachiever inspite of all the mess in their personal life. But having said that, they are walking on a fine line.
If one days suddenly something makes that shell to break up, then suddenly they are wreck.coz waves of pain then surge and submerge them forever from that very painful place they decided to forget forever. Hmmmmm.
You know,like a gangsta happily going arouund killing people for years, without a thought and then suddenly, one day after years, suddenly some realization about that truth about their life and the people around them dawns on them.They are such a wreck.Ya know, the gangsta then end up crying day in day out like crazy?
Just like a great dam broke..Hmmmm
anyways,gotta go now.