I am sure that is one use 
I just remove icons from the toolbox for tools that I very seldom use. They are always accessible from the Tools menu.
Typically:
Foreground Select - not very good.
Zoom - I use the mouse scroll wheel
Align - very rarely needed by me
Cage Transform - covered that one
Air Brush and Ink tool - I can see artists use but I never use these
Heal Tool - Prefer the regular clone tool which I use a lot
Perspective Clone - do not think I have ever used that.
Blur and Sharpen / Dodge and Burn - use them sometimes, there in the tools menu
Then the whole load of icons that are not enabled by default.
I just remove icons from the toolbox for tools that I very seldom use. They are always accessible from the Tools menu.
Typically:
Foreground Select - not very good.
Zoom - I use the mouse scroll wheel
Align - very rarely needed by me
Cage Transform - covered that one
Air Brush and Ink tool - I can see artists use but I never use these
Heal Tool - Prefer the regular clone tool which I use a lot
Perspective Clone - do not think I have ever used that.
Blur and Sharpen / Dodge and Burn - use them sometimes, there in the tools menu
Then the whole load of icons that are not enabled by default.