There are psychological reasons why people restrain disgust - fear of becoming "wrong", shame, unwillingness to show that they are in a toxic situation, fear of confusing disgust with anger.
It is unpleasant for a person to face disgust, but sometimes it is necessary. Children who are forced to eat cold porridge hold back a spasm in the throat - you can’t refuse food, otherwise they will be punished. So a person gets used to encountering toxic substances and feelings, but not to show it. This leads to a lack of awareness and a loss of taste for life.
In other situations, shame interferes. If we are focused on the abominable in man, then we feel a sense of shame. We are ashamed to look closely - a person will notice our attention. But we look to understand how he got into difficult circumstances, how wounded. This shame is normal - it is worth accepting it, seeing in the gaze pity and fear, as shame and disgust will immediately recede.
Disgust helps to notice our tastes and desires - some of them may not coincide with the generally accepted. For example, traditions of celebrating the New Year or birthday may be disgusting to a person. If you do not show disgust, you can lose a part of your own “I”, if you show it, you can become special, unlike others. In each situation, a person chooses what to do, seeks a balance between the freedom to be himself and a sense of community.
Aversion is sometimes confused with anger and afraid to manifest it.
But these feelings are the opposite. Aversion is always associated with increasing distance - you need to escape from the unpleasant. Anger makes you approach another, try to correct him and run only when it is impossible to fix.