Is community rating fair?

A large part of the motivation of the Affordable Care Act is to provide insurance to those with pre-existing conditions. Under the law, insurance is offered to everyone at a price based on overall community risk, not the risk estimated by the insurance company based on a person's particular characteristics. That has been deemed "fair" by advocates of the law.

I wonder whether advocates of this view are concerned with other insurance markets.  Teenage drivers pay a lot more for auto insurance. The old pay a lot more for life insurance.  Life insurance companies require health screening before granting a policy. Is this a problem, or the natural and desirable functioning of markets?

In the law, having children has been deemed a pre-existing condition, although it is not quite described as such. Everyone is now expected to buy insurance to pay for pregnancy and maternity care, even those who never intend to have children. The goal is to spread the risk of childbirth among the larger community.

But having children is more a choice than a random act of nature. People who drive a new Porsche pay more for car insurance than those who drive an old Chevy. We consider that fair because which car you drive is a choice.  Why isn't having children viewed in the same way?

I don't know the answer to these questions. But it does seem that fairness in health insurance pricing is being viewed very differently than fairness in pricing other types of insurance.  I wonder why.