Spare me your excuses, pillager of the earth. Wear a poncho and strap the briefcase onto the back of the cycle. Rent a car on the days when you need to drive around clients. As for snow and rain, who cares? Sure, a four-wheeled vehicle would be marginally safer for you, but it wouled be substantially more dangerous to everyone else on the road. If the accident rates for four-wheeled vehicles factored in the fatalities they cause, then it would be seen that motorcycles are vastly safer for society.
Nope, the bottom line is that anyone who can get by with a sedan could get by with a motorcycle just as well. I myself, of course, am not such a person—my lifestyle requires both an SUV and a minivan. But I operate on a higher moral plane where I can make such decisions dispassionately. Everyone else scuttling around below me in those rice-burning econoboxes had better have a good excuse for needing four seats and a roof, or else they ought to be driving motorcycles.
Is that enough, or do I actually have to put in the </sarcasm> tag?