OT - Win7 [Start] Menu Locations

So, in Windows 7, Microsoft changed the location of the [Start] Menu as follows.

• Win7 User [Start] Menu location

C:\Users\profile-name\AppData\Roaming\Microsoft\Windows\Start Menu\Programs


• "Win7 All Users" [Start] Menu location

C:\ProgramData\Microsoft\Windows\Start Menu\Programs


• "Win7 All Users" Desktop

C:\Users\Public\Desktop

My question is why for heavens sake? Especially the location of "All Users" [Start] Menu. What was wrong with keeping the convention like C:\Users\All Users\ ? I have no problem with the change of C:\Documents and Settings -> C:\Users, at least this is logical.