There are many reasons this doesn't happen; developmental stage, not being co-regulated, not knowing how, being too "civilised" and so on.
Emotional Freedom Techniques (EFT) dissolves these emotional charges in our nervous system by tapping on various parts of the body. One reason (of many) that EFT works, is that the crystalline structure of the collagen molecules that make up our connective tissue or fascia is a semiconductor. Semiconductors are not only able to conduct energy, they are also able to conduct information. By tapping on the acupressure points contained within our fascia, piezoelectric signals are sent throughout the nervous system (which includes our brain) and dissolve the charge. The really fascinating thing though is that EFT also works even if you imagine tapping on the points!I think this is because our intention when we tap, or do any work, is really important.
Each memory, or trauma/dissociation capsule as Robert Scaer phrases it, can have several emotional charges and each memory will contain distinct details. By working on the details of a memory/capsule; a narrative, body sensations etc. you can dissolve the charges that are disrupting and disregulating your nervous system. With EFT you can work with implicit or explicit memory, you do not have to have a narrative for EFT to be effective. It can work with no talking whatsoever.
The more undissolved charges we have in our nervous system, the more adverse effects on our physical and mental health. These 'charges' divert energy away from healing to just coping and surviving which is no way to live and thrive. It is like trying to keep beach balls submerged under water all the time, it is absolutely exhausting.
The nervous system is like a giant electrical grid that connects all organs and all systems in the body with the brain ~ Gabor Maté