People in cars don't see other cars or motorcycles. They don't see trikes, either. The best attitude while riding isn't to assume that people don't see you, the best posture is to assume they see you and are actively trying to kill you. I'm sure you already have, but consider the danger element very carefully. Death isn't necessarily the worst that can happen. Your attention level on a bike should be ten-fold what it is in a car. It's not a good time to sight-see, but riding can be a lot of fun in itself.
Having said that, I've ridden thousands of smile-filled miles and only limp on one leg. It's worth it to me, and I continue to ride after limping for 25 years, but not everybody feels that way.