Simple selection inside geometry not support for Blender?

Try select cubes inside another cubes with box select. Blender can`t do this in 2021?
All 3d apps has raycast selection for objects. Blender has not.
this nessesary function needed for working with cad object that has a thousand objects inside another objects.
Maybe any solutions or addons for this simple function?
untitled.blend (933.7 KB)

In your .blend-file in the Scene Collection, right-click in your collection “inside” and select “Select objects”