RE: If kits didn't exist ?
All parts of the hooby have a place. I enjoy flying ARF's and yet take more enjoyment in building from a kit and then flying it. I take even more enjoyment from building from a set of plans and then flying it. I see a good deal of people in the hobby who would rather buy a plane as close to ready to fly as possible. One of my everyday fliers for YEARS were the GP big stick 40, Twist 60 and Frenzy. They fly great with little mantainance and give me the time I want to build from kits and plans.
Anyone who can build from a kit can go a little further and build from plans. The only thing I usually have to do different is search around for canopies and landing gears. Most things needed are redally available and the only addl. tool needed is a scroll saw and one can be bopught at low cost. I got mine on sale from Sears about 6 years ago and the bottom line was about $50 and cuts up to an inch thick are no problem.
I started tracing wing ribs for a liberty sport today from a set of plans from a sig kit. Tracing paper will then be rubber cemented to poster board and cut out and traced on to balsa (or whatever called for). Stacked wood is held together with common pins and cut out on the scroll saw.