Read my career planning for doctors's blog
Here are just some of the reasons
As you can see from this small number of comments - career support is not always sought because radical change is wanted. It can be just as relevant for exploring potential in a current role or returning to work that one did before after time away from work. Thus career change is a much much broader term than most people use it for. It can refer to anything that makes a current career better. Changing attitude, changing location, changing hours - are all elements of career change.
Many times a medic will say they want a major career change when in fact what they really want is to find a way of working that enables them to gain satisfaction and feel they are making a difference. This may at times be achieved without a radical leap.