Wizards are called setup assistants on the mac. Most applications that require help come with an assistant. However scanners and cameras are not manfucatured by apple. So only cameras and scanners that confirm to open standards will be automatcially setup with iphoto or image capture.
Most digital cmeras do confirm to stadnards. Scanners don't therefore most scanners come with 3rd party software.
How on earth does one scan in Mac? Im talking about a native MAC application for scanning, not something through Word, Adobe etc. Did the software designers simply miss this one when they stayed up late at night writing code?
If your scanner is twain compliant and you have installed its driver then it is support in image capture.
/Applications/Image Capture.app
Did the software designers simply miss this one when they stayed up late at night writing code?
No. Image Capture has been around since the begining of osx. Printers had a setup assistant but in leopard that assitant is now within the printer preference pane and not a standalone app.
The first time you plug a camera in iphoto will ask you if you want iphoto to handle the picture transfers etc.
I really don't see where your getting lost.
If you have a specific issue with a piece of hardware then please post your problem but next time I would suggest you post in the correct section of the forum as this thread is way off topic and not related to getting online and networking.