There are two kinds of people…
One kind likes to have the trash can / recycle bin on their computers empty. They take every opportunity to right click and select clear / empty trash. Emptying that trash can provides them with a cathartic release.
The other kind treats the trash can as another storage folder. It frequently has thousands of files, residing in there for months. Clearing the trash can brings to them a dreadful feat of loss—of the unknown unknown. Clearing the recycle bin is only done when system space runs low, and even then, painstakingly, on a file by file basis.