There are 2 possibilities.
Nonetheless, one day or other, these quite people will erupt like volcanoes to punish the oppressor.
“Beauty perishes in life, but is immortal in art” -Leonardo da Vinci
Human beings take all efforts to look pleasant and presentable. And, try all methods like physical and food restrictions. Yet they have no control to retain their appearance or beauty as they desire. Because, by nature, all humans undergo ageing and reach end of life.
However, the photographs or painting of the humans remain to exhibit their beauty as immortal.
Taj mahal stands as a monument of Beauty of love though the persons behind such architecture are no more.
Humans are very strange species. They laugh when a new born cries. They cry when a person is dead.
The logic might be this. They are happy when a new member arrives and laments when somebody leaves others behind after creating all kinds of relationships and memories to those alive.
Another funny reason might be. They enjoy the birth of a new soul as if they get another companion to share the sufferings in worldly life. They grieve when a soul passes away, because they are made to suffer longer .