Why can we not create dropdown menu lists as part of the "create new field" process rather then having to create each separately then join them together?

In an ideal world when I'm creating a new field I want to check the Use Dropdown List box and the dropdown name is automatically populated with the same name as the field I just started creating (I can change it if I wish) and the wizard then invites me to enter the dropdown menu items. If I prefer, I just finish creating the field and add it to the layout and add the menu items later.

This would save loads of time customising a database.

Jeff