Motorcycles and sports cars are often the careless ones.
Not in my experience. There are numerous times I've seen large vehicles weaving across lane lines, drivers are texting or eating and are careless. Then there are the lane changers who never turn their heads around to look, relying on their mirrors or not at all. A lot of people own large SUVs and trucks yet can't see below the passenger windows. One of my friends that owned a large truck was complaining to me that people are always honking at him when he changes lanes. I asked him if he's aware of smaller vehicles next to him. He said it's their responsibility to get out of his way when he changes lanes! He said it's not his fault if he can't see below his windows! I told him someone would someday shoot him if he kept that up.
I've had cars come up alongside my motorcycle and bump it, pure negligence on their part. I've never had an accident with my motorcycles or sports cars in over 50 years of driving, and never caused an accident with my other cars. I have been hit several times by red light or stop sign runners and had my car totaled. A lot of safety has to do with watching out for the other guy and avoiding them; sometimes unavoidable if they run a light.