Earlier quoted context omitted.
Why is that inherently bad? Should I be able to buy fire insurance on pre-existing embers?
It interacts badly with insurance being offered as workplace benefit. If you quit or lose your job, you'd lose your health insurance. And any plan you signed up for after that would then treat you as "pre-existing embers" and expect you to pay accordingly. The bundling of health insurance with workplace seems like the healthcare original sin to me. Obama couldn't change that, so the ACA redesigned the system to work…
Maybe a department of Return on Investment. See what those taxes pay for. Contrast to buying private versions of the services at the same SLA or better.