Its about the ride quality. Safety, conditioning, time schedule. All this determines where I start the ride and finish.

Safety has already been commented. Conditioning to me means making a ride with a distance that fits the riders conditioning. That means trying to eliminate the junk miles and to concentrate on the quality miles. Certain miles on certain routes just aren't worth riding as much. Most of us have a life outside of riding and the time schedule dictates how much time a rider may spend on this activity.

So driving to a start is both acceptable and necessary.