Think about it. Your wide front wheels would hit things like the inner fender if you were allowed to turn any sharper. Its a trade off but a civic can turn on a dime because it has narrow front wheels so they can allow them to be turned in further.
The steering rack has limiters on it to prevent rubbing (I'm pretty sure both sides have them). If you go w/a smaller tire w/the correct offset, you could (theoretically) put smaller limiters or remove them.
If you don't like the turning radius on our cars, try driving a Fox body. I love my '99 compared to my '91!
Lowering our cars change the steering geometry by a certain percentage. The 04 Control arms give you back about 10 percent better geometry. Tously Ford will get you a good deal on the control arms. It's a noticeable difference. I more so changed out the control arms because I wanted to replace the stock 01 arms anyways with a beefier 04 component