How come there are no old people on wall-e?

In the movie "WALL-E," the absence of older people is largely due to the storyline's focus on a future where humanity has abandoned Earth and lives on a spaceship, where they have become overly reliant on technology. This environment fosters a sedentary lifestyle that has caused humans to age prematurely and lose physical vitality, leading to a homogeneous population of young adults and children. The film emphasizes themes of environmental neglect and the consequences of consumerism, which may imply that older generations have either perished or are no longer present in this future scenario.