The fear of the world around makes one less mobile. One is too afraid to go out, basically.

The ability to be mobile is what makes depression to go out.

  [1] https://www.ncbi.nlm.nih.gov/books/NBK99429/
  [2] https://edition.cnn.com/2024/02/14/health/exercise-treat-depression-wellness/index.html

The difference between contemporary life and the life a century ago is the mobility, amongst others.

One had to go to store to buy something to eat then, now food can be delivered to the door.