Insurance is based on risk assessment. Covering preexisting conditions negates that and is no longer insurance.
I disagree. The majority of the population has some sort of pre-existing condition; high blood pressure, high cholesterol, migraines, bladder infections, flu, colds, pneumonia, back pain, pregnancy, neck pain, etc. So ... should we eliminate covering those ailments for tens of thousands of people? Wrong.
Health insurance should cover medical conditions period. That is what health insurance is for; covering health issues.
Insurance premiums maybe more costly for those who are considered higher risk, but to eliminate coverage is wrong; otherwise, perhaps we shouldn't pay our premiums unless we actually use the coverage. IOW, if I haven't been to the doctor in a year, should I see a return of my premium or have it applied to the following year? No different really than car insurance; you get in accidents, or get tickets your rates may go up. If you have a heart attack or have high blood pressure; your rates may go up. But to eliminate providing insurance because someones was/is ill, is ridiculous.