“insuring” a pre-existing condition isn’t insurance.
As a site old-timer, you are probably aware that even the most hardcore self-proclaimed conservatives turn into “gimme gimme gimme” liberals when it comes to pre-existing conditions and health insurance.
What they want is to have their medical care - care that, with a pre-existing condition, has a well-known and predictable value - subsidized by somebody else. If you have diabetes and you will automatically require approximately $5,000 in medical care during the year for that diabetic condition, then your premiums should reflect this. Why they or anybody else think somebody else should pay for this is beyond me.