I didn't say that experienced riders eschew a rack. I said that they lean their bikes up against the rear tire. I was trying to point out a habit that would help those that didn't know about it.

In many places there are no commercial racks available. For example, if you are trying to register for a ride/event/race and you want to keep your bike off the ground, you can lean it up against a tree/etc by the back tire. If you're at your car getting ready for a ride, you can lean the rear tire against your car tire or rubber trim etc.

I don't own a commercial rack for my home, but I regularly lean my bike up against stuff - the walls in the basement for example.

hope this helps
cdr